ADT^A41 — Merge Account — Patient Account Number
Merge of two patient accounts (Patient Account Number, PID-18) without touching the Patient ID itself. Billing / cash side.
Purpose
A41 merges two patient accounts in the financial sense. The patient itself remains unchanged (PID-3 stays the same). Typical case: two stays opened for the same person for administrative reasons, consolidated into a single account.
Segment structure
Structure ADT_A39. MSH, EVN, PID (survivor with PID-18), MRG (absorbed account in MRG-3).
Real-world example
Merge of account AC20260517999 (duplicate) into AC20260518001 (survivor):
MSH|^~\&|PMS|HOSP01|EHR|CLINIC02|20260518140000||ADT^A41^ADT_A39|MSG00041001|P|2.5.1|||AL|NE
EVN|A41|20260518140000|||ACCT001^Manager^Billing^^^MS.|MERGE BILLING ACCOUNTS
PID|1||MR100500^^^HOSP^MR||PETIT^SOPHIE^^^MS.||19890402|F|||||+33145007890|||||AC20260518001
MRG|||||AC20260517999Acknowledgment (ACK)
MSH|^~\&|EHR|CLINIC02|PMS|HOSP01|20260518140001||ACK^A41^ACK|ACK00041001|P|2.5.1
MSA|AA|MSG00041001Common errors
- Patient ID modified by mistake: A41 must leave PID-3 untouched; only PID-18 (Patient Account Number) should change.
- MRG-3 missing: the receiver does not know which account to absorb.
- Financial transactions not re-attached: pre-existing DFTs must point to the new account.
Related ADT events
| Code | Trigger event | Description |
|---|---|---|
| A41 | Merge Account | This page. |
| A40 | Merge Patient — Patient ID | Patient merge (visit impact). |
| A44 | Move Account | Move rather than merge. |