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3.2.43 ADT/ACK - move patient information - internal ID (event A43)

A move has been done at the internal identifier level. That is, a PID-3-patient ID (internal ID) associated with one external identifier (PID-2-patient ID (external ID)) has been moved to another external identifier.

An A43 event is used to signal a move of records identified by the MRG-1-prior patient ID - Internal from the "incorrect source external identifier" identified in the MRG segment (MRG-4-prior patient ID-external) to the "correct target external identifier" identified in the PID segment (PID-2-patient ID (external ID).

The internal ID involved in identifying the patient to be moved (MRG-1-prior patient ID-internal) may or may not have accounts, which may or may not have visits. In any case, all subordinate data sets associated with the internal ID in MRG-1-prior patient ID-internal are moved along with the internal ID, from the "incorrect source external ID" (MRG-4) to the "correct target external ID" (PID-2-patient ID (external ID).

No identifiers subordinate to the internal ID (account number, visit number, alternate visit ID) are valued in this message. Specification of these other subordinate identifiers is not required.

This event and the message syntax do, however, allow for the specification of a "new identifier" (PID-3-patient ID (internal ID), which may be application and/or implementation specific and therefore require site negotiation.

All the identifiers superior to the internal ID should be valued in both the MRG segment and the PID segment. In this message, the external ID is superior to the internal id.

See Section 3.5.2, "Merging patient/person information," for a discussion of issues related to the implementation of move messages.

The fields included when this message is sent should be the fields pertinent to communicate this event. When demographic data in other fields change, it is recommended that the A08 (update patient information) event be used in conjunction with this message. However, all PID data associated with the "correct target internal ID" (PID-3-patient ID (internal ID)) are treated as updated information.

ADT     ADT Message        Chapter
MSH      Message Header        2
EVN     Event Type         3 
{  PID    Patient Identification      3
   [PD1]    Additional Demographics      3
   MRG     Merge Information        3
}
ACK     General Acknowledgment     Chapter
MSH     Message Header        2
MSA     Message Acknowledgment      2
[ ERR ]    Error          2

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