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  <element id="bpmc_CollaborativeArrangementTransactionPrice" name="CollaborativeArrangementTransactionPrice" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTransactionPriceUpfrontPayment" name="CollaborativeArrangementTransactionPriceUpfrontPayment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTransactionPriceMilestonePaymentsReceivable" name="CollaborativeArrangementTransactionPriceMilestonePaymentsReceivable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTransactionPriceInventoryPurchasedByCounterpartyExistingManufacturingInventory" name="CollaborativeArrangementTransactionPriceInventoryPurchasedByCounterpartyExistingManufacturingInventory" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTransactionPriceInventoryPurchasedByCounterpartyInProcessManufacturingInventory" name="CollaborativeArrangementTransactionPriceInventoryPurchasedByCounterpartyInProcessManufacturingInventory" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTransactionPriceStockIssuedPremiumOnSaleOfStockToCounterparty" name="CollaborativeArrangementTransactionPriceStockIssuedPremiumOnSaleOfStockToCounterparty" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesContingentPaymentsEligibleToReceive" name="CollaborativeArrangementMilestonesContingentPaymentsEligibleToReceive" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesSpecifiedRegulatoryAndCommercializationMilestonesAchieved" name="CollaborativeArrangementMilestonesSpecifiedRegulatoryAndCommercializationMilestonesAchieved" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementPercentageOfGlobalDevelopmentCostsSharedEntity" name="CollaborativeArrangementPercentageOfGlobalDevelopmentCostsSharedEntity" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementPercentageOfGlobalDevelopmentCostsSharedCounterparty" name="CollaborativeArrangementPercentageOfGlobalDevelopmentCostsSharedCounterparty" nillable="true" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementUpfrontPaymentCashPaymentReceived" name="CollaborativeArrangementUpfrontPaymentCashPaymentReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesCashPaymentsReceived" name="CollaborativeArrangementMilestonesCashPaymentsReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementInventoryPurchasedByCounterparty" name="CollaborativeArrangementInventoryPurchasedByCounterparty" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMaterialPromisesNumber" name="CollaborativeArrangementMaterialPromisesNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_RevenuePerformanceObligationPerformanceObligationsNumber" name="RevenuePerformanceObligationPerformanceObligationsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesDevelopmentAndRegulatoryMilestonesContingentPaymentsEligibleToReceive" name="CollaborativeArrangementMilestonesDevelopmentAndRegulatoryMilestonesContingentPaymentsEligibleToReceive" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesSalesBasedMilestonesContingentPaymentsEligibleToReceive" name="CollaborativeArrangementMilestonesSalesBasedMilestonesContingentPaymentsEligibleToReceive" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMaterialComponentsNumber" name="CollaborativeArrangementMaterialComponentsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementLicensedProductTermFromFirstCommercialSale" name="CollaborativeArrangementLicensedProductTermFromFirstCommercialSale" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementLicenseOptionRightsNumber" name="CollaborativeArrangementLicenseOptionRightsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementCollaborationProgramsWithExclusiveCommercializationRightsNumber" name="CollaborativeArrangementCollaborationProgramsWithExclusiveCommercializationRightsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementCollaborationProgramsNumber" name="CollaborativeArrangementCollaborationProgramsNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementCollaborationProgramsLicensedProductsCommercializationRightsCounterpartyExercisesOptionCounterpartyReceivesWorldwideExclusivityNumber" name="CollaborativeArrangementCollaborationProgramsLicensedProductsCommercializationRightsCounterpartyExercisesOptionCounterpartyReceivesWorldwideExclusivityNumber" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementOptionFeesAndMilestonesContingentPaymentsEligibleToReceive" name="CollaborativeArrangementOptionFeesAndMilestonesContingentPaymentsEligibleToReceive" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriod" name="CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriodAfterOptionExerciseIfLicensedProductsHaveNotBeenCommerciallySold" name="CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriodAfterOptionExerciseIfLicensedProductsHaveNotBeenCommerciallySold" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriodAfterOptionExerciseIfLicensedProductsHaveBeenCommerciallySold" name="CollaborativeArrangementTerminationCounterpartyWrittenNoticePeriodAfterOptionExerciseIfLicensedProductsHaveBeenCommerciallySold" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesResearchMilestonesAchieved" name="CollaborativeArrangementMilestonesResearchMilestonesAchieved" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementManufacturingAndResearchAndDevelopmentServicesRelatedToGlobalDevelopmentActivitiesNetOfCostSharingPayments" name="CollaborativeArrangementManufacturingAndResearchAndDevelopmentServicesRelatedToGlobalDevelopmentActivitiesNetOfCostSharingPayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_InventoryCurrentAndNoncurrentNet" name="InventoryCurrentAndNoncurrentNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_InventoryCurrentAndNoncurrentWorkInProcessNetOfReserves" name="InventoryCurrentAndNoncurrentWorkInProcessNetOfReserves" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_InventoryCurrentAndNoncurrentFinishedGoodsNetOfReserves" name="InventoryCurrentAndNoncurrentFinishedGoodsNetOfReserves" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_ScheduleOfInventoryCurrentAndNoncurrentTableTextBlock" name="ScheduleOfInventoryCurrentAndNoncurrentTableTextBlock" nillable="true" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMaterialPromisesManufacturingActivitiesTerm" name="CollaborativeArrangementMaterialPromisesManufacturingActivitiesTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="bpmc_CollaborativeArrangementMilestonesAchieved" name="CollaborativeArrangementMilestonesAchieved" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="InventoryCurrentAndNoncurrentRawMaterialsNetOfReserves" id="bpmc_InventoryCurrentAndNoncurrentRawMaterialsNetOfReserves" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TerritorySpecificActivitiesManufacturingAndOtherServicesMember" id="bpmc_TerritorySpecificActivitiesManufacturingAndOtherServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CollaborativeArrangementStrategicResearchCollaborationTerm" id="bpmc_CollaborativeArrangementStrategicResearchCollaborationTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="UniversityOfTexasMdAndersonCancerCenterMember" id="bpmc_UniversityOfTexasMdAndersonCancerCenterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
