6.0 HL7 Message Segment

A segment is a logical grouping of data fields, and as stated earlier, they may be required or optional. They may occur only once or may be allowed to repeat. Each segment is given a unique 3-character name or code. This code is known as the Segment ID.
Below is a list of defined segments that may be used in an ADT message. Each ADT message can contain one or more of these segments.
Note: Data fields detail of each HL7 segment will not be described in this tutorial

Sample LINKMED® HL7 ADT segments Mapper Configuration

Segment	LINKMED® Mapper Field Tag	Segment Functions
ADT ACK/NAK
MSH	MSH	Message Header
[{SFT}]	SFT	Software Segment
[UAC]	UAC	User Authentication Credential Segment
MSA	MSA	Message Acknowledgment
Mapper Template
MSH	MSH	Message Header
[{SFT}]	[HL7TEMPLATE]SFT_1	Software Segment
[UAC]	[UAC]	User Authentication Credential
EVN	EVN	Event Type
PID	PID	Patient Identification
[PD1]	[PD1]	Patient Additional Demographic Segment
[{NK1}]	[HL7TEMPLATE]NK1_1	Next of Kin
PV1	PV1	Patient Visit
[PV2]	[PV2]	Patient Visit
[{ARV}]	[HL7TEMPLATE]ARV_1	Access Restriction
[{AL1}]	[HL7TEMPLATE]AL1_1	Allergy Information
[{DG1}]	[HL7TEMPLATE]DG1_1	Diagnosis Information
{IN1}	[HL7TEMPLATE]IN1_1	Insurance Information
[{IN2..IN3}]	[HL7TEMPLATE]IN1_2(3)	Additional Insurance Information
[DB1]	[DB1]	Disability Segment
[ACC]	[ACC]	Accident Information
[MRG]	[MRG]	Merge Patient Information
[{ROL}]	ROL_1 (USE TEMPLATE TAG)	Role Segment (uses only if required)
XO1	[OUTHL7TEMPLATE]X01_1	LINKMED® Internal Interface Engine Segment