Previous Page TOC Index Next Page

3.2.47 ADT/ACK - change internal ID (event A47)

A change has been done at the internal identifier level. That is, a PID-3-patient ID (internal ID) has been found to be incorrect and has been changed.

An A47 event is used to signal a change of an incorrectly assigned internal ID value. The "incorrect source internal ID" value is stored in the MRG segment (MRG-1-prior patient ID-internal) and is to be changed to the "correct target external ID" value stored in the PID segment (PID-3-patient ID (internal ID).

The internal ID involved in identifying the patient may or may not have accounts, which may or may not have visits. An A47 (change internal ID) event A47 is intended for changing the value of the internal identifier without affecting other subordinate identifiers. Any other subordinate identifiers that were previously associated with the "incorrect source internal ID" are now associated with the "correct target internal ID". Specification of these other subordinate identifiers is not required to be provided.

This event and the message syntax do, however, allow for the specification of "new subordinate identifiers" (in addition to the PID-3-patient ID (internal ID) identifier). For those environments that may require changes to these other subordinate identifiers because of this A47 (change internal ID) event, it is required that the old and new identifiers be a "tightly coupled" pair.

Each superior identifier associated with this internal identifier level should have the same value in both the PID and MRG segments.

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

Previous Page TOC Index Next Page