ADT^A18
ADT/ACK - Merge patient information
Patient Administration
Event A18 has been retained for backward compatibility. The A18 event was used to merge current and previous patient identification numbers: PID-3 - patient identifier list, PID-2 - patient ID, PID-4 - alternate patient ID-PID, and PID-18 - patient account number. This procedure is required, for example, when a previous patient is registered under a new patient identification number because of an error, or because there was insufficient time to determine the actual patient identification number. The merge event occurs when a decision is made to combine the information under either the new or the old identifier(s). The PID segment contains the surviving patient ID information. The MRG segment contains the non-surviving information.
From V2.3.1 onwards events A40 (merge patient-patient identifier list), A41 (merge account-patient account number), and A42 (merge visit-visit number) should be utilized in place of the A18 event.
Message Types
Message Type
Trigger Structure
Return Structure
Event Flow
TriggerA18
SendADT_A18
ReceiveACK