CodeSystems The following CodeSystems are defined in this implementation Guide. CodeSystem Description DispensingSitePreferencens Digital Medicine Prescription Treatment Type - not used externally For conversion only, not to be used in FHIR implementations DMPrescriptionExemptionEvidence DMPrescriptionCharge EPS Issue Codes EPS Prescription (Business) Status EPS Prescription Release Rejection Reason medicationdispense-endorsement medicationdispense type MedicationDispense Status Reason MedicationRequest Category Additional Categories for use in the UK MedicationRequest Category Controlled Drug MedicationRequest Course of Therapy EPS Dispense Return Reason NHSBSAPrescriberEndorsements MedicationRequest Status Reason History MedicationRequest Status Reason Prescriptiontypens back to top