The A33 event is sent when an A09 (patient departing - tracking) event is canceled, either because of erroneous entry of the A09 event or because of a decision not to send the patient after all.
If the patient was in a non-temporary location, then PV1-3-assigned patient location must contain the original patient location prior to the erroneous A09 (patient departing-tracking) event. If the patient was in a temporary location, then PV1-11-temporary location must contain the original patient location prior to the erroneous A09 (patient departing-tracking) event.
The fields, included when this message is sent, should be the fields pertinent to communicate this event. When other important fields change it is recommended that the A08 (update patient information) event be used instead.
ADT ADT Message Chapter
MSH Message Header 2
EVN Event Type 3
PID Patient Identification 3
[PD1] Additional Demographics 3
PV1 Patient Visit 3
[ PV2 ] Patient Visit - Additional Info. 3
[ { DB1 } ] Disability Information 3
[ { OBX } ] Observation/Result 7
ACK General Acknowledgment Chapter
MSH Message Header 2
MSA Message Acknowledgment 2
[ ERR ] Error 2