ACK_A48
3.2.48 ADT/ACK - change alternate patient ID (event A48)
3 segments
With HL7 v.2.3.1, event A48 is being retained for backward compatibility, corresponding with PID-4-alternate Patient ID-PID, which is also retained for backward compatibility. Event A47 (change patient identifier list) should be used instead. A change has been done at the alternate patient identifier level. That is, a PID-4-alternate patient ID-PID has been found to be incorrect and has been changed.
An A48 event is used to signal a change of an incorrectly assigned alternate patient identifier value. The "incorrect source alternate patient ID" value is stored in the MRG segment (MRG-2-prior alternate patient ID) and is to be changed to the "correct target alternate patient ID" value stored in the PID segment (PID-4-alternate patient ID-PID).
Message Structure
3 segments
R RequiredO Optional Choice
MSH
R1MSA
R1ERR
O1