http://hl7.org/fhir/StructureDefinition/patient-preferredPharmacy|5.2.0

The pharmacies that are preferred for dispensing prescribed medications. A patient might prefer their local pharmacy. A provider in a given practice may prefer a pharmacy near their clinic. Or facilities may have a preference to use an in-house pharmacy. These preferences may be represented using this extension on several resource types, and are expected to be inputs into a process that determines which pharmacy is ultimately used to dispense a medication. That process may include considering drug formularies, pharmacy operating hours, pharmacy inventory, practitioner preferences, patient preferences, etc.