Medication Request
Medication Request API covers data related all provider prescribed, inpatient, and outpatient administered and patient self-prescribed medications list.
The Medication Request API provides orders for all medications along with administration instructions for a patient in both the inpatient and outpatient setting (orders/prescriptions filled by a pharmacy and discharge medication orders).
The Medication Request API return fields including Status, intent, reported, medication, Subject (Patient), encounter, authoredOn (when request was authored), Requester and doseageInstruction (how medication should be taken).
Based on:
http://hl7.org/fhir/us/core/StructureDefinition/us-core-medicationrequest