HL7 Workbench
Beta
v2.4
Message Structures
ADT_A21
HL7 v2.x
Parser
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ADT_A21
ADT_A21
8 segments · 9 events
...
2.3.1
May
1999
2.4
Oct
2000
2.5
Aug
2003
...
Message Structure
Message Structure
8 segments
Tree
Grammar
R
Required
O
Optional
Choice
MSH
R
1
EVN
R
1
PID
R
1
PD1
O
1
PV1
R
1
PV2
O
1
DB1
O
*
OBX
O
*
Used by Events
9 events
A21
ADT/ACK - Patient goes on a "leave of absence"
A22
ADT/ACK - Patient returns from a "leave of absence"
A23
ADT/ACK - Delete a patient record
A25
ADT/ACK - Cancel pending discharge
A26
ADT/ACK - Cancel pending transfer
A27
ADT/ACK - Cancel pending admit
A29
ADT/ACK - Delete person information
A32
ADT/ACK - Cancel patient arriving - tracking
A33
ADT/ACK - Cancel patient departing - tracking