Download Message Segment Specifications

Segment ID Element Name
MSH.19
Typea Length
Principal
Language of
Message
CE
Comments
60
Req’db
NS
a. For a description of the HL7 data types, see “Data Type Specifications” on page 176.
b. R = Required, O = Optional, C = Conditional, NS = Not Supported.
EVN—Event Type Segment
The Event Type (EVN) segment is used to communicate necessary trigger event information
to receiving applications.
Segment ID Element Name Typea Length
Comments
Req’db
EVN.00
Segment
Type ID
ST
4
Must be EVN.
R
EVN.01
Event Type Code
ID
3
The second component (trigger event)
of MSH.09 (Message Type) should be
used to transmit event type code
information. This field contains the
events corresponding to the trigger
events described in this section.
R
Note: This field has been retained for
backward compatibility only.
EVN.02
Recorded
Date/Time
TS
26
The date and time that the transaction
was entered.
O
EVN.03
Date/Time
Planned Event
TS
26
The date and time that the event is
planned.
O
EVN.04
Event Reason
Code
IS
3
The reason for the event.
O
EVN.05
Operator ID
XCN
60
The individual responsible for
triggering the event.
O
EVN.06
Event Occurred
TS
26
The date and time that the event
actually occurred.
O
a. For a description of the HL7 data types, see “Data Type Specifications” on page 176.
b. R = Required, O = Optional, C = Conditional, NS = Not Supported.
ADT A31 (Patient Update) Message Segment Specifications
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