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  <xs:element id="incy_ShareRepurchaseProgramTenderOfferSharePrice" abstract="false" name="ShareRepurchaseProgramTenderOfferSharePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="incy_ShareRepurchaseFeesAndExpenses" abstract="false" name="ShareRepurchaseFeesAndExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesPerRestrictedStockUnits" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesPerRestrictedStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAndStockAppreciationRightsImpactOnAuthorizedShareLimitation" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAndStockAppreciationRightsImpactOnAuthorizedShareLimitation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfWorkingHoursPerWeekRequiredToParticipateUnderPlan" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfWorkingHoursPerWeekRequiredToParticipateUnderPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmploymentPeriodToParticipateUnderPlan" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEmploymentPeriodToParticipateUnderPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="incy_RangeOfExercisePricesOneMember" abstract="true" name="RangeOfExercisePricesOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesTwoMember" abstract="true" name="RangeOfExercisePricesTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesThreeMember" abstract="true" name="RangeOfExercisePricesThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesFourMember" abstract="true" name="RangeOfExercisePricesFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesFiveMember" abstract="true" name="RangeOfExercisePricesFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesSixMember" abstract="true" name="RangeOfExercisePricesSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesSevenMember" abstract="true" name="RangeOfExercisePricesSevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesEightMember" abstract="true" name="RangeOfExercisePricesEightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesNineMember" abstract="true" name="RangeOfExercisePricesNineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_RangeOfExercisePricesTenMember" abstract="true" name="RangeOfExercisePricesTenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsAbstract" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="incy_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsAbstract" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOtherWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOtherWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReleasedInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesAvailableForGrantRollForward" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesAvailableForGrantRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesGranted" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesGranted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesCanceled" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesCanceled" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesFungibleRatioChangeAdjustments" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesFungibleRatioChangeAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="incy_DeferredTaxAssetIncreaseDecreaseAmount" abstract="false" name="DeferredTaxAssetIncreaseDecreaseAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_DeferredTaxAssetsContingentConsideration" abstract="false" name="DeferredTaxAssetsContingentConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_ForeignIncomeTaxCreditCarryforwardMember" abstract="true" name="ForeignIncomeTaxCreditCarryforwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_DefinedBenefitPlanBenefitObligationTransferOfBenefitsNet" abstract="false" name="DefinedBenefitPlanBenefitObligationTransferOfBenefitsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_DefinedBenefitPlanExpensesPaidFromAssets" abstract="false" name="DefinedBenefitPlanExpensesPaidFromAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_DefinedBenefitPlanPlanAssetsTransferOfBenefitsNet" abstract="false" name="DefinedBenefitPlanPlanAssetsTransferOfBenefitsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal" abstract="false" name="DefinedBenefitPlanExpectedFutureBenefitPaymentsTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_LineOfCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum" abstract="false" name="LineOfCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="incy_DebtInstrumentVariableRateFloor" abstract="false" name="DebtInstrumentVariableRateFloor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="incy_DebtInstrumentCreditSpreadAdjustmentOnVariableRate" abstract="false" name="DebtInstrumentCreditSpreadAdjustmentOnVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="incy_USCentersForMedicareAndMedicaidServicesMember" abstract="true" name="USCentersForMedicareAndMedicaidServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_AccruedAndOtherCurrentLiabilitiesMember" abstract="true" name="AccruedAndOtherCurrentLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_LossContingencesGrossToNetDeductionPercentage" abstract="false" name="LossContingencesGrossToNetDeductionPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="incy_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_ResearchAndDevelopmentExpenseInternal" abstract="false" name="ResearchAndDevelopmentExpenseInternal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_ResearchAndDevelopmentExpenseExternal" abstract="false" name="ResearchAndDevelopmentExpenseExternal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="incy_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="incy_PabloCagnoniMember" abstract="true" name="PabloCagnoniMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
