Sections FHIR STU3 to R4 Conversion Structural (schema) differences between HL7 FHIR STU3 and R4 are documented Differences from Release 3 CareConnect and NHSDigital/UKCore Differences Pages MedicationRequest.courseOfTherapyType MedicationRequest.dispenseRequest.numberofrepeatsallowed MedicationRequest.category Medication[x].medicationCodeableConcept