patient.merged
Two MRNs were merged.
Two MRNs were merged.
| Event type | patient.merged |
|---|---|
| Scope | site |
| Idempotency key | Stable across retries and derived only from source data: HL7 {sourceId}:{feedKey}:{MSH-7 ms}:{MSH-10}:{eventKey}, FHIR {sourceId}:fhir:{type}/{id}/_history/{version}:{n}. |
| Since | 1.0 |
| HL7 v2 | ADT^A40, ADT^A34, ADT^A18 |
| FHIR R4 | — |
When to send
A40 (A34 or A18 in older feeds).
What it changes
- Encounters carrying the retired MRN hash are relinked to the surviving hash.
JSON Schema
Example
{ "specVersion": "1.0", "id": "demo-epic-bridges:ADT000512:0", "type": "patient.merged", "siteCode": "demo-ed", "occurredAt": "2026-09-14T15:10:00-04:00", "source": { "kind": "ehr", "system": "epic", "feed": "adt" }, "data": { "survivingMrn": "E1234567", "retiredMrn": "E7654321" }}