In the MedicationDispense resource for FHIR r4 , the identifier attribute identifies the External identifier
"identifier":
"identifier":
"partOf":
"status": "completed"
"statusReason[x]":
"category":
"medication[x]":
"subject": {
"reference": "Patient/pat1",
"display": "Donald Duck"
}
"context":
"supportingInformation":
"performer": [
{
"actor": {
"reference": "Practitioner/f006"
}
}
]
"location":
"authorizingPrescription": [
{
"reference": "MedicationRequest/medrx0309"
}
]
"type":
"quantity":
"daysSupply":
"whenPrepared":
"whenHandedOver":
"destination":
"receiver":
"note":
"dosageInstruction": [
{
"sequence": 1,
"timing": {
"repeat": {
"frequency": 2,
"period": 21,
"periodUnit": "d"
}
},
"route": {
"coding": [
{
"system": "http://snomed.info/sct",
"code": "394899003",
"display": "oral administration of treatment"
}
]
},
"doseAndRate": [
{
"type": {
"coding": [
{
"system": "http://terminology.hl7.org/CodeSystem/dose-rate-type",
"code": "ordered",
"display": "Ordered"
}
]
},
"doseQuantity": {
"value": 500,
"unit": "mg",
"system": "http://unitsofmeasure.org",
"code": "mg"
}
}
]
}
]
"substitution":
"detectedIssue":
"eventHistory":