

<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.humana.com/role/AcquisitionsAndDivestitures" xlink:href="hum-20161231.xsd#AcquisitionsAndDivestitures" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/AcquisitionsAndDivestituresDetail" xlink:href="hum-20161231.xsd#AcquisitionsAndDivestituresDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/AdditionalInformationDetail" xlink:href="hum-20161231.xsd#AdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayable" xlink:href="hum-20161231.xsd#BenefitsPayable" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayableActivityInBenefitsPayableDetail" xlink:href="hum-20161231.xsd#BenefitsPayableActivityInBenefitsPayableDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayableAdditionalInformationDetail" xlink:href="hum-20161231.xsd#BenefitsPayableAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayableBenefitExpensesExcludedFromActivityInBenefitsPayableDetail" xlink:href="hum-20161231.xsd#BenefitsPayableBenefitExpensesExcludedFromActivityInBenefitsPayableDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayableBenefitsExpenseDetails" xlink:href="hum-20161231.xsd#BenefitsPayableBenefitsExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/BenefitsPayableTables" xlink:href="hum-20161231.xsd#BenefitsPayableTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/CommitmentsGuaranteesAndContingencies" xlink:href="hum-20161231.xsd#CommitmentsGuaranteesAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesAdditionalInformationDetail" xlink:href="hum-20161231.xsd#CommitmentsGuaranteesAndContingenciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesFutureAnnualMinimumPaymentsDueDetail" xlink:href="hum-20161231.xsd#CommitmentsGuaranteesAndContingenciesFutureAnnualMinimumPaymentsDueDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesRentExpenseAndSubleaseRentalIncomeAssociatedWithOperatingLeasesDetail" xlink:href="hum-20161231.xsd#CommitmentsGuaranteesAndContingenciesRentExpenseAndSubleaseRentalIncomeAssociatedWithOperatingLeasesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesTables" xlink:href="hum-20161231.xsd#CommitmentsGuaranteesAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedBalanceSheets" xlink:href="hum-20161231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="hum-20161231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="hum-20161231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="hum-20161231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedStatementsOfIncome" xlink:href="hum-20161231.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="hum-20161231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/Debt" xlink:href="hum-20161231.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/DebtAdditionalInformationDetail" xlink:href="hum-20161231.xsd#DebtAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/DebtCommercialPaperDetails" xlink:href="hum-20161231.xsd#DebtCommercialPaperDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/DebtTables" xlink:href="hum-20161231.xsd#DebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/DebtTermDebtOfOutstandingDetail" xlink:href="hum-20161231.xsd#DebtTermDebtOfOutstandingDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/DocumentAndEntityInformation" xlink:href="hum-20161231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EarningsPerCommonShareComputation" xlink:href="hum-20161231.xsd#EarningsPerCommonShareComputation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EarningsPerCommonShareComputationScheduleOfDetailsSupportingComputationOfEarningsPerShareDetail" xlink:href="hum-20161231.xsd#EarningsPerCommonShareComputationScheduleOfDetailsSupportingComputationOfEarningsPerShareDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EarningsPerCommonShareComputationTables" xlink:href="hum-20161231.xsd#EarningsPerCommonShareComputationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlans" xlink:href="hum-20161231.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansActivityForOptionPlansDetail" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansActivityForOptionPlansDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansStockBasedCompensationExpenseDetail" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansStockBasedCompensationExpenseDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansTables" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansWeightedAverageFairValueOfStockOptionsDetail" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansWeightedAverageFairValueOfStockOptionsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/EmployeeBenefitPlansWeightedAverageGrantDateFairValueOfRestrictedStockAwardsDetail" xlink:href="hum-20161231.xsd#EmployeeBenefitPlansWeightedAverageGrantDateFairValueOfRestrictedStockAwardsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProducts" xlink:href="hum-20161231.xsd#ExpensesAssociatedWithLongDurationInsuranceProducts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsAdditionalInformationDetail" xlink:href="hum-20161231.xsd#ExpensesAssociatedWithLongDurationInsuranceProductsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsScheduleOfDeferredAcquisitionCostAndFuturePolicyBenefitsPayableWithOurLongDurationInsuranceProductsDetail" xlink:href="hum-20161231.xsd#ExpensesAssociatedWithLongDurationInsuranceProductsScheduleOfDeferredAcquisitionCostAndFuturePolicyBenefitsPayableWithOurLongDurationInsuranceProductsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsTables" xlink:href="hum-20161231.xsd#ExpensesAssociatedWithLongDurationInsuranceProductsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/FairValue" xlink:href="hum-20161231.xsd#FairValue" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/FairValueChangesInFairValueOfAssetsMeasuredUsingSignificantUnobservableInputsDetail" xlink:href="hum-20161231.xsd#FairValueChangesInFairValueOfAssetsMeasuredUsingSignificantUnobservableInputsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/FairValueDetail" xlink:href="hum-20161231.xsd#FairValueDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/FairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="hum-20161231.xsd#FairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/FairValueTables" xlink:href="hum-20161231.xsd#FairValueTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssets" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsAdditionalInformationDetail" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssetsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillByReportableSegmentsDetail" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillByReportableSegmentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsDetailsOfIntangibleAssetsIncludedInOtherLongTermAssetsDetail" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssetsDetailsOfIntangibleAssetsIncludedInOtherLongTermAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsScheduleOfEstimatedAmortizationExpenseDetail" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssetsScheduleOfEstimatedAmortizationExpenseDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:href="hum-20161231.xsd#GoodwillAndOtherIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/HealthCareReform" xlink:href="hum-20161231.xsd#HealthCareReform" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/HealthCareReformDetails" xlink:href="hum-20161231.xsd#HealthCareReformDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/HealthCareReformTables" xlink:href="hum-20161231.xsd#HealthCareReformTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxes" xlink:href="hum-20161231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="hum-20161231.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxesPrincipalComponentsOfNetDeferredTaxBalancesDetail" xlink:href="hum-20161231.xsd#IncomeTaxesPrincipalComponentsOfNetDeferredTaxBalancesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxesProvisionForIncomeTaxesDetail" xlink:href="hum-20161231.xsd#IncomeTaxesProvisionForIncomeTaxesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxesProvisionForIncomeTaxesUsingFederalStatutoryRateDetail" xlink:href="hum-20161231.xsd#IncomeTaxesProvisionForIncomeTaxesUsingFederalStatutoryRateDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/IncomeTaxesTables" xlink:href="hum-20161231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecurities" xlink:href="hum-20161231.xsd#InvestmentSecurities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesAdditionalInformationDetail" xlink:href="hum-20161231.xsd#InvestmentSecuritiesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesScheduleOfContractualMaturitiesOfDebtSecuritiesAvailableForSaleDetail" xlink:href="hum-20161231.xsd#InvestmentSecuritiesScheduleOfContractualMaturitiesOfDebtSecuritiesAvailableForSaleDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesDetail" xlink:href="hum-20161231.xsd#InvestmentSecuritiesScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesScheduleOfInvestmentSecuritiesClassifiedAsCurrentAndLongTermDetail" xlink:href="hum-20161231.xsd#InvestmentSecuritiesScheduleOfInvestmentSecuritiesClassifiedAsCurrentAndLongTermDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesScheduleOfRealizedGainsLossesRelatedToInvestmentSecuritiesIncludedWithinInvestmentIncomeDetail" xlink:href="hum-20161231.xsd#InvestmentSecuritiesScheduleOfRealizedGainsLossesRelatedToInvestmentSecuritiesIncludedWithinInvestmentIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/InvestmentSecuritiesTables" xlink:href="hum-20161231.xsd#InvestmentSecuritiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/MedicarePartD" xlink:href="hum-20161231.xsd#MedicarePartD" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/MedicarePartDDetail" xlink:href="hum-20161231.xsd#MedicarePartDDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/MedicarePartDTables" xlink:href="hum-20161231.xsd#MedicarePartDTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/PropertyAndEquipmentNet" xlink:href="hum-20161231.xsd#PropertyAndEquipmentNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/PropertyAndEquipmentNetAdditionalInformationDetail" xlink:href="hum-20161231.xsd#PropertyAndEquipmentNetAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/PropertyAndEquipmentNetDetail" xlink:href="hum-20161231.xsd#PropertyAndEquipmentNetDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/PropertyAndEquipmentNetTables" xlink:href="hum-20161231.xsd#PropertyAndEquipmentNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/QuarterlyFinancialInformationUnaudited" xlink:href="hum-20161231.xsd#QuarterlyFinancialInformationUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/QuarterlyFinancialInformationUnauditedDetails" xlink:href="hum-20161231.xsd#QuarterlyFinancialInformationUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/QuarterlyFinancialInformationUnauditedTables" xlink:href="hum-20161231.xsd#QuarterlyFinancialInformationUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/Reinsurance" xlink:href="hum-20161231.xsd#Reinsurance" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ReinsuranceAdditionalInformationDetail" xlink:href="hum-20161231.xsd#ReinsuranceAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ReinsuranceBalanceAndFinancialRatingRelatedToReinsurersDetail" xlink:href="hum-20161231.xsd#ReinsuranceBalanceAndFinancialRatingRelatedToReinsurersDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ReinsuranceTables" xlink:href="hum-20161231.xsd#ReinsuranceTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ReportingEntity" xlink:href="hum-20161231.xsd#ReportingEntity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ReportingEntityDetail" xlink:href="hum-20161231.xsd#ReportingEntityDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformation" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsDetail" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsParentheticalDetail" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsParentheticalDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfCashFlowsDetail" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformationCondensedStatementsOfCashFlowsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfComprehensiveIncomeDetail" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformationCondensedStatementsOfComprehensiveIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfIncomeDetail" xlink:href="hum-20161231.xsd#ScheduleIParentCompanyFinancialInformationCondensedStatementsOfIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:href="hum-20161231.xsd#ScheduleIiValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/ScheduleIiValuationAndQualifyingAccountsDetail" xlink:href="hum-20161231.xsd#ScheduleIiValuationAndQualifyingAccountsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SegmentInformation" xlink:href="hum-20161231.xsd#SegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SegmentInformationAdditionalInformationDetail" xlink:href="hum-20161231.xsd#SegmentInformationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SegmentInformationInformationBySegmentDetail" xlink:href="hum-20161231.xsd#SegmentInformationInformationBySegmentDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SegmentInformationTables" xlink:href="hum-20161231.xsd#SegmentInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/StockholdersEquity" xlink:href="hum-20161231.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/StockholdersEquityAdditionalInformationDetail" xlink:href="hum-20161231.xsd#StockholdersEquityAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/StockholdersEquityScheduleOfDetailsOfDividendPaymentsDetail" xlink:href="hum-20161231.xsd#StockholdersEquityScheduleOfDetailsOfDividendPaymentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/StockholdersEquityTables" xlink:href="hum-20161231.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="hum-20161231.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SummaryOfSignificantAccountingPoliciesDetail" xlink:href="hum-20161231.xsd#SummaryOfSignificantAccountingPoliciesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.humana.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="hum-20161231.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.humana.com/role/AcquisitionsAndDivestitures" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/AcquisitionsAndDivestituresDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/AdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayable" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayableActivityInBenefitsPayableDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_f6d4bcdb-a917-ae36-b64d-92ecf74c5168" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_94008c98-7583-e81a-5d43-4fb029a8b2bb" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_f6d4bcdb-a917-ae36-b64d-92ecf74c5168" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_94008c98-7583-e81a-5d43-4fb029a8b2bb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_efa1a5ee-9826-0b7a-7759-b5b2d7308d95" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_f6d4bcdb-a917-ae36-b64d-92ecf74c5168" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_efa1a5ee-9826-0b7a-7759-b5b2d7308d95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_6fe02665-4e77-a2f2-e51d-310632af8880" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_db00e364-1ef5-a5e3-ab4f-59534ed27398" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_6fe02665-4e77-a2f2-e51d-310632af8880" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_db00e364-1ef5-a5e3-ab4f-59534ed27398" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_fd40b6f4-e7ea-53b1-a860-f1d4a1cc2132" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_6fe02665-4e77-a2f2-e51d-310632af8880" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_fd40b6f4-e7ea-53b1-a860-f1d4a1cc2132" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayableAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayableBenefitExpensesExcludedFromActivityInBenefitsPayableDetail" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits" xlink:label="loc_hum_BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits_bba4bac7-cb1c-a584-0c0d-942670971107" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_MilitaryServicesBenefitExpenseBenefit" xlink:label="loc_hum_MilitaryServicesBenefitExpenseBenefit_ecf39f14-0b76-706d-a382-94267267a744" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits_bba4bac7-cb1c-a584-0c0d-942670971107" xlink:to="loc_hum_MilitaryServicesBenefitExpenseBenefit_ecf39f14-0b76-706d-a382-94267267a744" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForFuturePolicyBenefitsPeriodExpense" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitsPeriodExpense_fe3e7847-85b1-8c90-2b36-c6dd5d44eaa2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits_bba4bac7-cb1c-a584-0c0d-942670971107" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitsPeriodExpense_fe3e7847-85b1-8c90-2b36-c6dd5d44eaa2" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_HealthCareReformProvisionforPremiumDeficiency1" xlink:label="loc_hum_HealthCareReformProvisionforPremiumDeficiency1_23E8060A19A610DF31673D97850FE443" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_BenefitExpensesAssociatedWithMilitaryServicesAndProvisionsAssociatedWithFuturePolicyBenefits_bba4bac7-cb1c-a584-0c0d-942670971107" xlink:to="loc_hum_HealthCareReformProvisionforPremiumDeficiency1_23E8060A19A610DF31673D97850FE443" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayableBenefitsExpenseDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/BenefitsPayableTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/CommitmentsGuaranteesAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesFutureAnnualMinimumPaymentsDueDetail" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentTotal" xlink:label="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentWithinYearOne" xlink:label="loc_hum_NetOperatingLeaseCommitmentWithinYearOne_074678ed-4d09-93f6-bff9-9426715f3b07" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentWithinYearOne_074678ed-4d09-93f6-bff9-9426715f3b07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_00eaf688-6963-ad8a-03b8-e257d107b9c7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearOne_074678ed-4d09-93f6-bff9-9426715f3b07" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_00eaf688-6963-ad8a-03b8-e257d107b9c7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_1045d438-6948-b8c9-46a1-ee4f3580e222" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearOne_074678ed-4d09-93f6-bff9-9426715f3b07" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_1045d438-6948-b8c9-46a1-ee4f3580e222" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentWithinYearTwo" xlink:label="loc_hum_NetOperatingLeaseCommitmentWithinYearTwo_e15f6b70-1b06-fedb-6495-942670ec4cbd" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentWithinYearTwo_e15f6b70-1b06-fedb-6495-942670ec4cbd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5519a64c-2a56-b1d5-2ab3-ee16d7d2a7a5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearTwo_e15f6b70-1b06-fedb-6495-942670ec4cbd" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5519a64c-2a56-b1d5-2ab3-ee16d7d2a7a5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_07bfd5c6-3827-f7f1-39c4-c9370ee0e136" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearTwo_e15f6b70-1b06-fedb-6495-942670ec4cbd" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_07bfd5c6-3827-f7f1-39c4-c9370ee0e136" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentWithinYearThree" xlink:label="loc_hum_NetOperatingLeaseCommitmentWithinYearThree_097bdcb3-7cef-eec0-82ee-942672991ee5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentWithinYearThree_097bdcb3-7cef-eec0-82ee-942672991ee5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_2154b0cd-b6a4-a252-5801-385edf9d9702" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearThree_097bdcb3-7cef-eec0-82ee-942672991ee5" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_2154b0cd-b6a4-a252-5801-385edf9d9702" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_959fc161-66d3-9372-3953-05cd602239b5" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearThree_097bdcb3-7cef-eec0-82ee-942672991ee5" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_959fc161-66d3-9372-3953-05cd602239b5" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentWithinYearFour" xlink:label="loc_hum_NetOperatingLeaseCommitmentWithinYearFour_b09826d4-22d0-968e-a3a8-942675bd1d33" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentWithinYearFour_b09826d4-22d0-968e-a3a8-942675bd1d33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_c2ad5d03-49c6-819a-1ac6-e6584eea34ff" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearFour_b09826d4-22d0-968e-a3a8-942675bd1d33" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_c2ad5d03-49c6-819a-1ac6-e6584eea34ff" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_563d4555-e41a-7792-78fc-2aad5331dd09" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearFour_b09826d4-22d0-968e-a3a8-942675bd1d33" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_563d4555-e41a-7792-78fc-2aad5331dd09" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentWithinYearFive" xlink:label="loc_hum_NetOperatingLeaseCommitmentWithinYearFive_063f2bbf-0585-78e8-21e4-94267070475d" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentWithinYearFive_063f2bbf-0585-78e8-21e4-94267070475d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_d7e45dda-b3de-1974-4726-54d18939cd1c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearFive_063f2bbf-0585-78e8-21e4-94267070475d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_d7e45dda-b3de-1974-4726-54d18939cd1c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_fcaf9c44-5f9f-e7cc-37bf-302bc442eaa2" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentWithinYearFive_063f2bbf-0585-78e8-21e4-94267070475d" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_fcaf9c44-5f9f-e7cc-37bf-302bc442eaa2" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetOperatingLeaseCommitmentThereafter" xlink:label="loc_hum_NetOperatingLeaseCommitmentThereafter_0531e97a-b211-e553-0e8e-9426725234ba" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentTotal_302e6076-f085-1a4a-0f8b-942673b2840c" xlink:to="loc_hum_NetOperatingLeaseCommitmentThereafter_0531e97a-b211-e553-0e8e-9426725234ba" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_b89e7a90-e5d1-031a-5e13-781005c7ec6e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentThereafter_0531e97a-b211-e553-0e8e-9426725234ba" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_b89e7a90-e5d1-031a-5e13-781005c7ec6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_f2660b03-ee3f-0c19-f66f-3f0b78187b65" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetOperatingLeaseCommitmentThereafter_0531e97a-b211-e553-0e8e-9426725234ba" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_f2660b03-ee3f-0c19-f66f-3f0b78187b65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_00eaf688-6963-ad8a-03b8-e257d107b9c7" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5519a64c-2a56-b1d5-2ab3-ee16d7d2a7a5" xlink:type="arc" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_2154b0cd-b6a4-a252-5801-385edf9d9702" xlink:type="arc" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_c2ad5d03-49c6-819a-1ac6-e6584eea34ff" xlink:type="arc" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_d7e45dda-b3de-1974-4726-54d18939cd1c" xlink:type="arc" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_b89e7a90-e5d1-031a-5e13-781005c7ec6e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions" xlink:label="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear_1045d438-6948-b8c9-46a1-ee4f3580e222" xlink:type="arc" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears_07bfd5c6-3827-f7f1-39c4-c9370ee0e136" xlink:type="arc" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears_959fc161-66d3-9372-3953-05cd602239b5" xlink:type="arc" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears_563d4555-e41a-7792-78fc-2aad5331dd09" xlink:type="arc" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears_fcaf9c44-5f9f-e7cc-37bf-302bc442eaa2" xlink:type="arc" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactions_122eee87-59d8-02dd-5e15-5913ea32e487" xlink:to="loc_us-gaap_FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter_f2660b03-ee3f-0c19-f66f-3f0b78187b65" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesRentExpenseAndSubleaseRentalIncomeAssociatedWithOperatingLeasesDetail" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_OperatingLeaseRentalExpensesNet" xlink:label="loc_hum_OperatingLeaseRentalExpensesNet_3224b874-f3ff-2dbd-b7fd-942675f323df" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_c3466533-009e-4fad-f2f2-2a94f4e9ef5e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_OperatingLeaseRentalExpensesNet_3224b874-f3ff-2dbd-b7fd-942675f323df" xlink:to="loc_us-gaap_LeaseAndRentalExpense_c3466533-009e-4fad-f2f2-2a94f4e9ef5e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue" xlink:label="loc_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_bb05a767-42ca-6f13-9c7d-b140864af356" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_OperatingLeaseRentalExpensesNet_3224b874-f3ff-2dbd-b7fd-942675f323df" xlink:to="loc_us-gaap_OperatingLeasesIncomeStatementSubleaseRevenue_bb05a767-42ca-6f13-9c7d-b140864af356" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/CommitmentsGuaranteesAndContingenciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_3eb1c1c4-e8a2-c7fa-5de7-8720a2043973" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_3eb1c1c4-e8a2-c7fa-5de7-8720a2043973" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="loc_us-gaap_ReceivablesNetCurrent_bbf813cd-8531-daad-0362-0abcbe609fb5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_ReceivablesNetCurrent_bbf813cd-8531-daad-0362-0abcbe609fb5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_a4ff71e5-9279-179c-0a10-8aac1070408d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_a4ff71e5-9279-179c-0a10-8aac1070408d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_d723083e-f7a3-6d89-9926-32afaa010d8a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_Goodwill_d723083e-f7a3-6d89-9926-32afaa010d8a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_75b247f6-acf8-264e-d372-996aedbefe30" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_75b247f6-acf8-264e-d372-996aedbefe30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_87a74df5-6262-b3a0-1a5b-b344f689ad60" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_87a74df5-6262-b3a0-1a5b-b344f689ad60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherShortTermBorrowings" xlink:label="loc_us-gaap_OtherShortTermBorrowings_d2a6f461-7bd6-9fad-28b3-1dfcb320697d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_OtherShortTermBorrowings_d2a6f461-7bd6-9fad-28b3-1dfcb320697d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_71d04050-374b-2145-53d0-dc098f6f5b95" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_ShortTermBorrowings_71d04050-374b-2145-53d0-dc098f6f5b95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_898d9dde-51c0-10b5-4600-dc6b12c399c4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_898d9dde-51c0-10b5-4600-dc6b12c399c4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForFuturePolicyBenefits" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_b407ad4a-79d1-7818-1646-89583ef3732d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_b407ad4a-79d1-7818-1646-89583ef3732d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_3c8f3df4-466c-f78c-b021-17337fc4a147" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_PreferredStockValue_3c8f3df4-466c-f78c-b021-17337fc4a147" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_d53388e7-4c8c-4e6d-6e90-7a6e0a100b74" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_CommonStockValue_d53388e7-4c8c-4e6d-6e90-7a6e0a100b74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_b1a68b05-ec26-b896-ce8e-937cca99264e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_b1a68b05-ec26-b896-ce8e-937cca99264e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_f759e73e-9f4f-941e-1138-49bc44f6b118" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_f759e73e-9f4f-941e-1138-49bc44f6b118" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_aeb1020a-508a-a8c1-f34c-bafff16c26cb" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_aeb1020a-508a-a8c1-f34c-bafff16c26cb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_d36dfcc8-b62a-1868-1a67-2bd77655103a" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_TreasuryStockValue_d36dfcc8-b62a-1868-1a67-2bd77655103a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_49d65a66-0444-b198-9d28-5c0811b1bdf3" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_CommitmentsAndContingencies_49d65a66-0444-b198-9d28-5c0811b1bdf3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_35d7e9b2-6ffb-6e68-f590-8605f30d5f8a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_DepreciationAndAmortization_35d7e9b2-6ffb-6e68-f590-8605f30d5f8a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_86be9232-4c75-212d-a13b-e678f426cb85" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_86be9232-4c75-212d-a13b-e678f426cb85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_b5367bf2-397c-4180-7e1e-54dd40b7f0d0" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_b5367bf2-397c-4180-7e1e-54dd40b7f0d0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_49b75b63-2bef-54bd-9bf8-3a0ce9af35f3" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_49b75b63-2bef-54bd-9bf8-3a0ce9af35f3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d8c0a214-0b0d-1fc8-686b-ed5eca49895f" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d8c0a214-0b0d-1fc8-686b-ed5eca49895f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_4e4cc593-a8dd-98fb-a095-7146f324b004" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInHealthCareInsuranceLiabilities_4e4cc593-a8dd-98fb-a095-7146f324b004" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7a016eeb-d472-4272-2fad-97e749a6fbc2" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7a016eeb-d472-4272-2fad-97e749a6fbc2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_38bb77ff-9a71-da5a-ae9a-8c89f84c6b01" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_38bb77ff-9a71-da5a-ae9a-8c89f84c6b01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_fdbab275-b995-9f6e-4d30-38c2b0ed44dd" xlink:type="locator" />
    <link:calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_fdbab275-b995-9f6e-4d30-38c2b0ed44dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_51b81a6f-f6af-160e-e526-5abd0f450976" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_51b81a6f-f6af-160e-e526-5abd0f450976" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentForAmortization" xlink:label="loc_us-gaap_AdjustmentForAmortization_4fc91873-6294-4542-834d-501f7b56e6e8" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_AdjustmentForAmortization_4fc91873-6294-4542-834d-501f7b56e6e8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_614b3ef6-9c49-a693-9832-8c3fd7bc9fcc" xlink:type="locator" />
    <link:calculationArc order="14" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_614b3ef6-9c49-a693-9832-8c3fd7bc9fcc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4a851329-dac2-753a-9238-81894caa8647" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_4a851329-dac2-753a-9238-81894caa8647" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3bbf4f04-80a5-b675-b79f-4fadd33d27e7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3bbf4f04-80a5-b675-b79f-4fadd33d27e7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_da5d3613-0426-0efc-e877-f02868c1f6ef" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_da5d3613-0426-0efc-e877-f02868c1f6ef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5eef41ab-a09e-58ba-6708-d9dbc2498316" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5eef41ab-a09e-58ba-6708-d9dbc2498316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_8537a914-fea0-e31b-4574-5efbd321ed57" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_8537a914-fea0-e31b-4574-5efbd321ed57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_52a00194-f06c-4482-de20-9d1a485bf24a" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_52a00194-f06c-4482-de20-9d1a485bf24a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherDeposits_a4c72d7e-6b0b-f3b0-29f8-bbcf9487f23e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherDeposits_a4c72d7e-6b0b-f3b0-29f8-bbcf9487f23e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_185b815d-9b8f-b3a1-8e30-8e7db7df656f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_185b815d-9b8f-b3a1-8e30-8e7db7df656f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_90cd6d89-f315-788f-d750-05a68667e398" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_90cd6d89-f315-788f-d750-05a68667e398" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_fc2ca57d-dc62-7ce6-b2c4-25896bddd1fc" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_fc2ca57d-dc62-7ce6-b2c4-25896bddd1fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_4605b555-adcd-113a-c33e-54bbeff72938" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_PaymentsOfDividends_4605b555-adcd-113a-c33e-54bbeff72938" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_11b1e641-cd86-3d66-b07d-893757bffb5e" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_11b1e641-cd86-3d66-b07d-893757bffb5e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInBookOverdrafts" xlink:label="loc_us-gaap_IncreaseDecreaseInBookOverdrafts_6e916af1-4bf6-80e2-3c2d-4affb4461c3d" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_IncreaseDecreaseInBookOverdrafts_6e916af1-4bf6-80e2-3c2d-4affb4461c3d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_53bb4e1b-52b6-1bb1-1672-d14ea634a154" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_53bb4e1b-52b6-1bb1-1672-d14ea634a154" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfCommercialPaper" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_ade3b056-2be2-47ec-44d0-a89afddd03d6" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfCommercialPaper_ade3b056-2be2-47ec-44d0-a89afddd03d6" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_fc027bcf-19a3-7936-be65-3ec1deb94fb4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_fc027bcf-19a3-7936-be65-3ec1deb94fb4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_045a7791-44b8-d416-a735-af6ac83e7eb3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_fc027bcf-19a3-7936-be65-3ec1deb94fb4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_045a7791-44b8-d416-a735-af6ac83e7eb3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_cbccdc82-bbab-a298-aba7-ba75496b120b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_045a7791-44b8-d416-a735-af6ac83e7eb3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_cbccdc82-bbab-a298-aba7-ba75496b120b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_e66303ff-4dab-9bd8-8638-a8b98b882b3a" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_045a7791-44b8-d416-a735-af6ac83e7eb3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_e66303ff-4dab-9bd8-8638-a8b98b882b3a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_2295fde9-6004-04c5-d6d3-8f045ad42e78" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_fc027bcf-19a3-7936-be65-3ec1deb94fb4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_2295fde9-6004-04c5-d6d3-8f045ad42e78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_a1422aa3-75c0-abab-ec53-596c709a6d9f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_2295fde9-6004-04c5-d6d3-8f045ad42e78" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_a1422aa3-75c0-abab-ec53-596c709a6d9f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_124143f7-66bc-b09b-eaae-6c2b0283fa33" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_2295fde9-6004-04c5-d6d3-8f045ad42e78" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_124143f7-66bc-b09b-eaae-6c2b0283fa33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:to="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:to="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PremiumsEarnedNet" xlink:label="loc_us-gaap_PremiumsEarnedNet_7536213c-423b-16ae-a63f-b9e330c1e4a6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_us-gaap_PremiumsEarnedNet_7536213c-423b-16ae-a63f-b9e330c1e4a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueServicesNet" xlink:label="loc_us-gaap_SalesRevenueServicesNet_a3cfa2ef-65ce-536b-4778-0ecfaa8afbb9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_us-gaap_SalesRevenueServicesNet_a3cfa2ef-65ce-536b-4778-0ecfaa8afbb9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="loc_us-gaap_InvestmentIncomeInterestAndDividend_16ddf8b3-5458-39f1-e9e3-210cbf652aa6" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_us-gaap_InvestmentIncomeInterestAndDividend_16ddf8b3-5458-39f1-e9e3-210cbf652aa6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BenefitsLossesAndExpenses" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_2e27e1fd-18ca-e6ca-7656-8b18af7a5d31" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:to="loc_us-gaap_BenefitsLossesAndExpenses_2e27e1fd-18ca-e6ca-7656-8b18af7a5d31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredHealthCare" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredHealthCare_39a53884-5fe0-90d3-ccac-70ec858f905d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_2e27e1fd-18ca-e6ca-7656-8b18af7a5d31" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredHealthCare_39a53884-5fe0-90d3-ccac-70ec858f905d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_33158828-aa18-5ead-beab-c284c08cb606" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_2e27e1fd-18ca-e6ca-7656-8b18af7a5d31" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_33158828-aa18-5ead-beab-c284c08cb606" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_DepreciationAndAmortizationIncomeStatement" xlink:label="loc_hum_DepreciationAndAmortizationIncomeStatement_b9e45438-33d9-e762-04cd-63f2d3a03eac" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_2e27e1fd-18ca-e6ca-7656-8b18af7a5d31" xlink:to="loc_hum_DepreciationAndAmortizationIncomeStatement_b9e45438-33d9-e762-04cd-63f2d3a03eac" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_4b6ddf50-6253-3349-fa29-8fc77f744f58" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_InterestExpense_4b6ddf50-6253-3349-fa29-8fc77f744f58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_515980ca-4628-4bee-9429-657637fede9a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_515980ca-4628-4bee-9429-657637fede9a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/Debt" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/DebtAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/DebtCommercialPaperDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/DebtTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/DebtTermDebtOfOutstandingDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EarningsPerCommonShareComputation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EarningsPerCommonShareComputationScheduleOfDetailsSupportingComputationOfEarningsPerShareDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EarningsPerCommonShareComputationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlans" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansActivityForOptionPlansDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansStockBasedCompensationExpenseDetail" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_StockBasedCompensationExpenseNetOfTax" xlink:label="loc_hum_StockBasedCompensationExpenseNetOfTax_b6a90265-c59c-d261-12b2-942671fb3ae4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_StockBasedCompensationExpenseNetOfTax_b6a90265-c59c-d261-12b2-942671fb3ae4" xlink:to="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockExpense" xlink:label="loc_us-gaap_RestrictedStockExpense_d9051f32-200f-b12f-6330-00b2a1d7bd72" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:to="loc_us-gaap_RestrictedStockExpense_d9051f32-200f-b12f-6330-00b2a1d7bd72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockOptionPlanExpense" xlink:label="loc_us-gaap_StockOptionPlanExpense_ef3c7a4b-c74e-1e93-0498-59b2b171060d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:to="loc_us-gaap_StockOptionPlanExpense_ef3c7a4b-c74e-1e93-0498-59b2b171060d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_f3869d04-37b1-9497-4763-8451806f062a" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_StockBasedCompensationExpenseNetOfTax_b6a90265-c59c-d261-12b2-942671fb3ae4" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_f3869d04-37b1-9497-4763-8451806f062a" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansWeightedAverageFairValueOfStockOptionsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/EmployeeBenefitPlansWeightedAverageGrantDateFairValueOfRestrictedStockAwardsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProducts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsScheduleOfDeferredAcquisitionCostAndFuturePolicyBenefitsPayableWithOurLongDurationInsuranceProductsDetail" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_NetAssetLiabilityDeferredAcquisitionCost" xlink:label="loc_hum_NetAssetLiabilityDeferredAcquisitionCost_95180847-61d9-99ac-d8c5-942675e36b11" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_OtherLongTermAssetsDeferredAcquisitionCosts" xlink:label="loc_hum_OtherLongTermAssetsDeferredAcquisitionCosts_25d789bb-44f7-0586-0078-942670fafc78" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityDeferredAcquisitionCost_95180847-61d9-99ac-d8c5-942675e36b11" xlink:to="loc_hum_OtherLongTermAssetsDeferredAcquisitionCosts_25d789bb-44f7-0586-0078-942670fafc78" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_TradeAccountsPayableAndAccruedExpensesDeferredAcquisitionCost" xlink:label="loc_hum_TradeAccountsPayableAndAccruedExpensesDeferredAcquisitionCost_737565dd-e148-9d87-7991-9426721786e2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityDeferredAcquisitionCost_95180847-61d9-99ac-d8c5-942675e36b11" xlink:to="loc_hum_TradeAccountsPayableAndAccruedExpensesDeferredAcquisitionCost_737565dd-e148-9d87-7991-9426721786e2" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_OtherLongTermLiabilitiesDeferredAcquisitionCost" xlink:label="loc_hum_OtherLongTermLiabilitiesDeferredAcquisitionCost_4a4f6a6c-32fe-10fe-2a28-94267478a0cf" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityDeferredAcquisitionCost_95180847-61d9-99ac-d8c5-942675e36b11" xlink:to="loc_hum_OtherLongTermLiabilitiesDeferredAcquisitionCost_4a4f6a6c-32fe-10fe-2a28-94267478a0cf" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_NetAssetLiabilityFuturePolicyBenefitsPayable" xlink:label="loc_hum_NetAssetLiabilityFuturePolicyBenefitsPayable_e3c25149-7497-cfcd-e582-942674a816dd" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_OtherLongTermAssetsFuturePolicyBenefitsPayable" xlink:label="loc_hum_OtherLongTermAssetsFuturePolicyBenefitsPayable_d17fd42f-8262-f78f-b559-9426751226bc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityFuturePolicyBenefitsPayable_e3c25149-7497-cfcd-e582-942674a816dd" xlink:to="loc_hum_OtherLongTermAssetsFuturePolicyBenefitsPayable_d17fd42f-8262-f78f-b559-9426751226bc" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_TradeAccountsPayableAndAccruedExpensesFuturePolicyBenefitsPayable" xlink:label="loc_hum_TradeAccountsPayableAndAccruedExpensesFuturePolicyBenefitsPayable_1773b52a-5671-8fb6-c5bb-942673d46cea" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityFuturePolicyBenefitsPayable_e3c25149-7497-cfcd-e582-942674a816dd" xlink:to="loc_hum_TradeAccountsPayableAndAccruedExpensesFuturePolicyBenefitsPayable_1773b52a-5671-8fb6-c5bb-942673d46cea" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForFuturePolicyBenefits" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_b407ad4a-79d1-7818-1646-89583ef3732d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetAssetLiabilityFuturePolicyBenefitsPayable_e3c25149-7497-cfcd-e582-942674a816dd" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_b407ad4a-79d1-7818-1646-89583ef3732d" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ExpensesAssociatedWithLongDurationInsuranceProductsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/FairValue" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/FairValueChangesInFairValueOfAssetsMeasuredUsingSignificantUnobservableInputsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/FairValueDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/FairValueFinancialAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_fdc1f09c-fa08-4ac3-a9e1-6c69c28ccf56" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5987d7dd-ab82-bea6-ec65-c10216a0873a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentsFairValueDisclosure_fdc1f09c-fa08-4ac3-a9e1-6c69c28ccf56" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5987d7dd-ab82-bea6-ec65-c10216a0873a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InvestmentsFairValueDisclosure_fdc1f09c-fa08-4ac3-a9e1-6c69c28ccf56" xlink:to="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/FairValueTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssets" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsChangesInCarryingAmountOfGoodwillByReportableSegmentsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsDetailsOfIntangibleAssetsIncludedInOtherLongTermAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_27b15389-386a-f983-c189-731d6d3c3fbb" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_20da5796-2b47-ef11-689a-589894b52fb4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_27b15389-386a-f983-c189-731d6d3c3fbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_20da5796-2b47-ef11-689a-589894b52fb4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_d981c90e-1b35-63c2-c258-b2af7bf5b3e0" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_27b15389-386a-f983-c189-731d6d3c3fbb" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_d981c90e-1b35-63c2-c258-b2af7bf5b3e0" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsScheduleOfEstimatedAmortizationExpenseDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/GoodwillAndOtherIntangibleAssetsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/HealthCareReform" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/HealthCareReformDetails" xlink:type="extended">
    <link:loc xlink:href="hum-20161231.xsd#hum_NetCurrentLiabilityAsset" xlink:label="loc_hum_NetCurrentLiabilityAsset_f1bace75-689d-8b43-9513-63f2d3ad0bf4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PremiumsReceivableAtCarryingValue" xlink:label="loc_us-gaap_PremiumsReceivableAtCarryingValue_b0d63c35-f4f9-fe48-1839-982058b67c5f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetCurrentLiabilityAsset_f1bace75-689d-8b43-9513-63f2d3ad0bf4" xlink:to="loc_us-gaap_PremiumsReceivableAtCarryingValue_b0d63c35-f4f9-fe48-1839-982058b67c5f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetCurrentLiabilityAsset_f1bace75-689d-8b43-9513-63f2d3ad0bf4" xlink:to="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_87a74df5-6262-b3a0-1a5b-b344f689ad60" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_NetCurrentLiabilityAsset_f1bace75-689d-8b43-9513-63f2d3ad0bf4" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_87a74df5-6262-b3a0-1a5b-b344f689ad60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsNet" xlink:label="loc_us-gaap_AssetsNet_add64ded-b614-91b8-e633-df80e346b415" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNet_add64ded-b614-91b8-e633-df80e346b415" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="arc" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNet_add64ded-b614-91b8-e633-df80e346b415" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_87a74df5-6262-b3a0-1a5b-b344f689ad60" xlink:type="arc" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNet_add64ded-b614-91b8-e633-df80e346b415" xlink:to="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="arc" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNet_add64ded-b614-91b8-e633-df80e346b415" xlink:to="loc_us-gaap_PremiumsReceivableAtCarryingValue_b0d63c35-f4f9-fe48-1839-982058b67c5f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/HealthCareReformTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxesPrincipalComponentsOfNetDeferredTaxBalancesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_f549ecdb-d466-ac37-840e-8410ff9e5017" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:to="loc_us-gaap_DeferredTaxLiabilities_f549ecdb-d466-ac37-840e-8410ff9e5017" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_DeferredTaxLiabilitiesDepreciablePropertyAndIntangibleAssets" xlink:label="loc_hum_DeferredTaxLiabilitiesDepreciablePropertyAndIntangibleAssets_2bdf1ade-eb9b-bbd8-5a68-942671990c1f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_f549ecdb-d466-ac37-840e-8410ff9e5017" xlink:to="loc_hum_DeferredTaxLiabilitiesDepreciablePropertyAndIntangibleAssets_2bdf1ade-eb9b-bbd8-5a68-942671990c1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_f1f4efa9-db0e-4dc7-4de5-c80b7a5c9bcc" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_f549ecdb-d466-ac37-840e-8410ff9e5017" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_f1f4efa9-db0e-4dc7-4de5-c80b7a5c9bcc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPrepaidExpenses" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_3e75781b-05b6-84bf-a3c7-23de492af0ab" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_f549ecdb-d466-ac37-840e-8410ff9e5017" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPrepaidExpenses_3e75781b-05b6-84bf-a3c7-23de492af0ab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_DeferredTaxAssetsFuturePolicyBenefitsPayable" xlink:label="loc_hum_DeferredTaxAssetsFuturePolicyBenefitsPayable_131f7790-c26b-10cf-8e4e-9426704b5833" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_hum_DeferredTaxAssetsFuturePolicyBenefitsPayable_131f7790-c26b-10cf-8e4e-9426704b5833" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_d29dfd00-0275-f326-3d06-45b963758ad7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_d29dfd00-0275-f326-3d06-45b963758ad7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_d5c0e885-c088-f96a-70c1-a14921e400e0" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_d5c0e885-c088-f96a-70c1-a14921e400e0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_6826a434-0eba-a280-99df-92eaa6c3f055" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_6826a434-0eba-a280-99df-92eaa6c3f055" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_DeferredTaxAssetsDeferredPolicyAcquisitionCost" xlink:label="loc_hum_DeferredTaxAssetsDeferredPolicyAcquisitionCost_0506328a-3bff-583e-4b32-94267211df56" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_hum_DeferredTaxAssetsDeferredPolicyAcquisitionCost_0506328a-3bff-583e-4b32-94267211df56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_01fa55f4-2470-afa8-209c-8cc74ff002a4" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_01fa55f4-2470-afa8-209c-8cc74ff002a4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_bdc6598b-bd97-4cc7-9f4f-5d5ac82ed0ed" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_bdc6598b-bd97-4cc7-9f4f-5d5ac82ed0ed" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsInvestments" xlink:label="loc_us-gaap_DeferredTaxAssetsInvestments_bfff09af-c352-005e-7d55-182952e9ad26" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_344334d8-d156-37ea-1859-beb8bda06f5f" xlink:to="loc_us-gaap_DeferredTaxAssetsInvestments_bfff09af-c352-005e-7d55-182952e9ad26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_36eb2c32-e98d-f713-df5d-5d9e7e50b88d" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_36eb2c32-e98d-f713-df5d-5d9e7e50b88d" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxesProvisionForIncomeTaxesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_7107f7ad-ea23-072c-c2a3-7b97b29553fc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_7107f7ad-ea23-072c-c2a3-7b97b29553fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b8476f99-9bab-21a6-d61d-02a9c0661176" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_7107f7ad-ea23-072c-c2a3-7b97b29553fc" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b8476f99-9bab-21a6-d61d-02a9c0661176" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3ab57836-244f-310a-5a92-cb6b846a6a17" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_7107f7ad-ea23-072c-c2a3-7b97b29553fc" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3ab57836-244f-310a-5a92-cb6b846a6a17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_91674616-989d-90e8-1302-b52ff7a33098" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_91674616-989d-90e8-1302-b52ff7a33098" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxesProvisionForIncomeTaxesUsingFederalStatutoryRateDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_b6c76c51-9163-a2c4-e48f-4450dcc2ac29" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_b6c76c51-9163-a2c4-e48f-4450dcc2ac29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_01db0ee8-dc9d-9a44-534f-a2200747ef03" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_01db0ee8-dc9d-9a44-534f-a2200747ef03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxExemptIncome" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_975725c2-fd03-4fc0-52f7-fc0dc7716906" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_975725c2-fd03-4fc0-52f7-fc0dc7716906" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount" xlink:label="loc_hum_EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount_a05d8f24-7aa1-2f9f-571b-942670608edb" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_hum_EffectiveIncomeTaxRateReconciliationHealthInsurerFeeAmount_a05d8f24-7aa1-2f9f-571b-942670608edb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_9535bc9d-9685-491b-9666-d4ee81b2fb72" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_9535bc9d-9685-491b-9666-d4ee81b2fb72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_11289e28-2728-6877-19a4-d3db9fc50958" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_11289e28-2728-6877-19a4-d3db9fc50958" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationDispositionOfBusiness" xlink:label="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_857e6fc4-d5c6-328c-80fc-3f4d5841108b" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_IncomeTaxReconciliationDispositionOfBusiness_857e6fc4-d5c6-328c-80fc-3f4d5841108b" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecurities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesScheduleOfContractualMaturitiesOfDebtSecuritiesAvailableForSaleDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_73f419d8-d119-3f34-15a6-338e4455cd96" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_73f419d8-d119-3f34-15a6-338e4455cd96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_db3b580e-d182-4945-7c2e-ce877e78a106" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_db3b580e-d182-4945-7c2e-ce877e78a106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_5cad6420-c434-2b48-13db-6c315d141f54" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_5cad6420-c434-2b48-13db-6c315d141f54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_b2dd8726-7338-2922-d0d2-fa759fce3859" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_b2dd8726-7338-2922-d0d2-fa759fce3859" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_a79475c8-d9a2-5233-1397-04b8cf6c6a65" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_a79475c8-d9a2-5233-1397-04b8cf6c6a65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_64878df4-a4bb-ba61-aacb-ed249b31f694" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_64878df4-a4bb-ba61-aacb-ed249b31f694" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_59295b7e-c316-eccf-27db-e84d9ca58730" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_59295b7e-c316-eccf-27db-e84d9ca58730" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_4a130408-1560-1680-a9e9-a5b6577bac1b" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_4a130408-1560-1680-a9e9-a5b6577bac1b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_cceae702-c03a-63ab-909d-da89433a7398" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_cceae702-c03a-63ab-909d-da89433a7398" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_7bf284bc-1833-8ba9-88ec-da920c375901" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_7bf284bc-1833-8ba9-88ec-da920c375901" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_b1d71fc9-eecd-2005-af97-28330842089f" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_11612c57-1c66-2ebb-048d-5328a69f7e87" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_b1d71fc9-eecd-2005-af97-28330842089f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_11612c57-1c66-2ebb-048d-5328a69f7e87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_94eefac8-f76d-a881-1e74-cd6a8c26f6f2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_b1d71fc9-eecd-2005-af97-28330842089f" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_94eefac8-f76d-a881-1e74-cd6a8c26f6f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_3fa09329-0896-f55f-c02e-c8004aa08345" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_2c159316-1107-d1fe-3ca9-a0ff69e85bc6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_3fa09329-0896-f55f-c02e-c8004aa08345" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_2c159316-1107-d1fe-3ca9-a0ff69e85bc6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_28085bfb-becd-58b9-5554-fd2b42a29dab" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_3fa09329-0896-f55f-c02e-c8004aa08345" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_28085bfb-becd-58b9-5554-fd2b42a29dab" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesScheduleOfInvestmentSecuritiesClassifiedAsCurrentAndLongTermDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_84c4a6c6-0ef3-3da8-6f9e-7c79d920503a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_84c4a6c6-0ef3-3da8-6f9e-7c79d920503a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e53108a7-1cbc-ad68-00fa-93ab35ee9629" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e53108a7-1cbc-ad68-00fa-93ab35ee9629" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_b671a380-e06c-01fd-905c-c45ee0d0ab53" xlink:to="loc_us-gaap_AvailableForSaleSecurities_01be169b-08cc-7c30-55f5-941791d17ef8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesScheduleOfRealizedGainsLossesRelatedToInvestmentSecuritiesIncludedWithinInvestmentIncomeDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_86be9232-4c75-212d-a13b-e678f426cb85" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGains" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_d81613c6-4e09-8e47-82ec-c84c2688c4e4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_86be9232-4c75-212d-a13b-e678f426cb85" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_d81613c6-4e09-8e47-82ec-c84c2688c4e4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_6355c620-4ff2-91fe-cfd9-ce7e5b3beb0b" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_86be9232-4c75-212d-a13b-e678f426cb85" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_6355c620-4ff2-91fe-cfd9-ce7e5b3beb0b" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/InvestmentSecuritiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/MedicarePartD" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/MedicarePartDDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/MedicarePartDTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/PropertyAndEquipmentNet" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/PropertyAndEquipmentNetAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/PropertyAndEquipmentNetDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Land" xlink:label="loc_us-gaap_Land_667d1a41-669f-3aab-72f7-e84c123c2e4e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:to="loc_us-gaap_Land_667d1a41-669f-3aab-72f7-e84c123c2e4e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_d9fefc5a-548b-350e-f762-77b33f08d379" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:to="loc_us-gaap_BuildingsAndImprovementsGross_d9fefc5a-548b-350e-f762-77b33f08d379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="loc_us-gaap_MachineryAndEquipmentGross_4e601ab2-1dbc-5423-fb86-c88684959076" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:to="loc_us-gaap_MachineryAndEquipmentGross_4e601ab2-1dbc-5423-fb86-c88684959076" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareGross_8b455303-03c2-2bcc-3e0e-b2bf368d7085" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareGross_8b455303-03c2-2bcc-3e0e-b2bf368d7085" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_95ebcb07-1c4a-1ded-365f-edc9cd2fa101" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_95ebcb07-1c4a-1ded-365f-edc9cd2fa101" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/PropertyAndEquipmentNetTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/QuarterlyFinancialInformationUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/QuarterlyFinancialInformationUnauditedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/QuarterlyFinancialInformationUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/Reinsurance" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ReinsuranceAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ReinsuranceBalanceAndFinancialRatingRelatedToReinsurersDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ReinsuranceTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ReportingEntity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ReportingEntityDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_3eb1c1c4-e8a2-c7fa-5de7-8720a2043973" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_3eb1c1c4-e8a2-c7fa-5de7-8720a2043973" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsReceivableRelatedPartiesCurrent" xlink:label="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_9fdbfee6-324f-b7e9-4647-0fda973cb171" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_AccountsReceivableRelatedPartiesCurrent_9fdbfee6-324f-b7e9-4647-0fda973cb171" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_InvestmentInRelatedPartiesAndSubsidiaries" xlink:label="loc_hum_InvestmentInRelatedPartiesAndSubsidiaries_1734b2fc-a7c7-0fc6-cff5-9426757b30c0" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_hum_InvestmentInRelatedPartiesAndSubsidiaries_1734b2fc-a7c7-0fc6-cff5-9426757b30c0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_e44c6de1-55d8-ab67-a226-0b17f3a5ea43" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_e44c6de1-55d8-ab67-a226-0b17f3a5ea43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NotesPayableRelatedPartiesClassifiedCurrent" xlink:label="loc_us-gaap_NotesPayableRelatedPartiesClassifiedCurrent_95607706-032e-3ca1-f682-e28e35af6191" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_NotesPayableRelatedPartiesClassifiedCurrent_95607706-032e-3ca1-f682-e28e35af6191" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherShortTermBorrowings" xlink:label="loc_us-gaap_OtherShortTermBorrowings_d2a6f461-7bd6-9fad-28b3-1dfcb320697d" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_OtherShortTermBorrowings_d2a6f461-7bd6-9fad-28b3-1dfcb320697d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_71d04050-374b-2145-53d0-dc098f6f5b95" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_ShortTermBorrowings_71d04050-374b-2145-53d0-dc098f6f5b95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_0ff25fd8-f6de-e7fa-c6c3-85d94f17f57b" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_0ff25fd8-f6de-e7fa-c6c3-85d94f17f57b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_898d9dde-51c0-10b5-4600-dc6b12c399c4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_898d9dde-51c0-10b5-4600-dc6b12c399c4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="loc_us-gaap_NotesPayableRelatedPartiesNoncurrent_0cec4ef0-9bab-4759-1e28-b099964a92b1" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_NotesPayableRelatedPartiesNoncurrent_0cec4ef0-9bab-4759-1e28-b099964a92b1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_6d3ec995-5062-ef92-dd72-b570c1eafdc8" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedBalanceSheetsParentheticalDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfCashFlowsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_CapitalContributionsToOperatingSubsidiaries" xlink:label="loc_hum_CapitalContributionsToOperatingSubsidiaries_a86ea488-afdb-022f-7666-942676521bdc" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_hum_CapitalContributionsToOperatingSubsidiaries_a86ea488-afdb-022f-7666-942676521bdc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5eef41ab-a09e-58ba-6708-d9dbc2498316" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_5eef41ab-a09e-58ba-6708-d9dbc2498316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_52a00194-f06c-4482-de20-9d1a485bf24a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_52a00194-f06c-4482-de20-9d1a485bf24a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_8537a914-fea0-e31b-4574-5efbd321ed57" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_8537a914-fea0-e31b-4574-5efbd321ed57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3bbf4f04-80a5-b675-b79f-4fadd33d27e7" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_3bbf4f04-80a5-b675-b79f-4fadd33d27e7" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfComprehensiveIncomeDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIParentCompanyFinancialInformationCondensedStatementsOfIncomeDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_IncomeLossBeforeEquityInNetEarningsOfSubsidiaries" xlink:label="loc_hum_IncomeLossBeforeEquityInNetEarningsOfSubsidiaries_47c12a5c-a469-1890-70f0-9426711221c6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_hum_IncomeLossBeforeEquityInNetEarningsOfSubsidiaries_47c12a5c-a469-1890-70f0-9426711221c6" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_LossBeforeIncomeTaxesAndEquityInNetEarningsOfSubsidiaries" xlink:label="loc_hum_LossBeforeIncomeTaxesAndEquityInNetEarningsOfSubsidiaries_84abf226-8169-5fb7-e72e-9426703ea74a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_IncomeLossBeforeEquityInNetEarningsOfSubsidiaries_47c12a5c-a469-1890-70f0-9426711221c6" xlink:to="loc_hum_LossBeforeIncomeTaxesAndEquityInNetEarningsOfSubsidiaries_84abf226-8169-5fb7-e72e-9426703ea74a" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_IncomeLossBeforeIncomeTaxesandEquityinNetEarningsOfSubsidiaries" xlink:label="loc_hum_IncomeLossBeforeIncomeTaxesandEquityinNetEarningsOfSubsidiaries_5cde845a-8e31-c5a5-42fe-942671b2c8e5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_LossBeforeIncomeTaxesAndEquityInNetEarningsOfSubsidiaries_84abf226-8169-5fb7-e72e-9426703ea74a" xlink:to="loc_hum_IncomeLossBeforeIncomeTaxesandEquityinNetEarningsOfSubsidiaries_5cde845a-8e31-c5a5-42fe-942671b2c8e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_515980ca-4628-4bee-9429-657637fede9a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_LossBeforeIncomeTaxesAndEquityInNetEarningsOfSubsidiaries_84abf226-8169-5fb7-e72e-9426703ea74a" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_515980ca-4628-4bee-9429-657637fede9a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_hum_IncomeLossBeforeEquityInNetEarningsOfSubsidiaries_47c12a5c-a469-1890-70f0-9426711221c6" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_EquityInNetEarningsOfSubsidiaries" xlink:label="loc_hum_EquityInNetEarningsOfSubsidiaries_3c7826fe-df58-7083-bda8-942670660d0e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_hum_EquityInNetEarningsOfSubsidiaries_3c7826fe-df58-7083-bda8-942670660d0e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_33158828-aa18-5ead-beab-c284c08cb606" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_33158828-aa18-5ead-beab-c284c08cb606" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_b6c36e3f-ea84-a440-1267-34444a0f8e78" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_Depreciation_b6c36e3f-ea84-a440-1267-34444a0f8e78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_4b6ddf50-6253-3349-fa29-8fc77f744f58" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_InterestExpense_4b6ddf50-6253-3349-fa29-8fc77f744f58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:type="locator" />
    <link:loc xlink:href="hum-20161231.xsd#hum_ManagementFeesChargedToOperatingSubsidiaries" xlink:label="loc_hum_ManagementFeesChargedToOperatingSubsidiaries_fd991639-7a9b-7a8e-989b-942671eb65ce" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_hum_ManagementFeesChargedToOperatingSubsidiaries_fd991639-7a9b-7a8e-989b-942671eb65ce" xlink:type="arc" />
    <link:loc xlink:href="hum-20161231.xsd#hum_InvestmentAndOtherIncomeNet" xlink:label="loc_hum_InvestmentAndOtherIncomeNet_28c0d3fa-89c6-00f3-8ead-942671ac8055" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_hum_InvestmentAndOtherIncomeNet_28c0d3fa-89c6-00f3-8ead-942671ac8055" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/ScheduleIiValuationAndQualifyingAccountsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SegmentInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SegmentInformationAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SegmentInformationInformationBySegmentDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SegmentInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/StockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/StockholdersEquityAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/StockholdersEquityScheduleOfDetailsOfDividendPaymentsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/StockholdersEquityTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SummaryOfSignificantAccountingPoliciesDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.humana.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
</link:linkbase>





