This code system http://hl7.org/fhir/benefit-type defines the following codes:

CodeDisplayDefinition
benefitBenefitMaximum benefit allowable.
deductableDeductableCost to be incurred before benefits are applied
visitVisitService visit
roomRoomType of room
copayCopayment per serviceCopayment per service
copay-percentCopayment Percent per serviceCopayment percentage per service
copay-maximumCopayment maximum per serviceCopayment maximum per service
vision-examVision ExamVision Exam
vision-glassesVision GlassesFrames and lenses
vision-contactsVision Contacts CoverageContact Lenses
medical-primarycareMedical Primary Health CoverageMedical Primary Health Coverage
pharmacy-dispensePharmacy Dispense CoveragePharmacy Dispense Coverage