Segments
38 segments in HL7 v2.1
§2.5.2 Segments and Segment Groups:Segments are the building blocks of HL7 messages. Each segment is a logical grouping of related data fields, identified by a three-character code (e.g., MSH, PID, OBR). Segments can be required, optional, or repeating within a message structure.
ACC
ACCIDENT
3 fields•Used in 1 structure
ADD
ADDENDUM
1 field
BHS
BATCH HEADER
12 fields
BLG
BILLING
3 fields•Used in 1 structure
BTS
BATCH TRAILER
3 fields
DG1
DIAGNOSIS
14 fields•Used in 13 structures
DSC
CONTINUATION POINTER
1 field•Used in 8 structures
DSP
DISPLAY DATA
5 fields•Used in 3 structures
ERR
ERROR
1 field•Used in 27 structures
EVN
EVENT TYPE
4 fields•Used in 27 structures
FHS
FILE HEADER
12 fields
FT1
FINANCIAL TRANSACTION
22 fields•Used in 1 structure
FTS
FILE TRAILER
2 fields
GT1
GUARANTOR
20 fields•Used in 1 structure
IN1
INSURANCE
44 fields•Used in 1 structure
MRG
MERGE PATIENT INFORMATION
3 fields•Used in 1 structure
MSA
MESSAGE ACKNOWLEDGMENT
5 fields•Used in 35 structures
MSH
MESSAGE HEADER
14 fields•Used in 69 structures
NCK
SYSTEM CLOCK
1 field
NK1
NEXT OF KIN
5 fields•Used in 6 structures
NPU
NON-PATIENT UPDATE
2 fields•Used in 1 structure
NSC
STATUS CHANGE
9 fields
NST
STATISTICS
15 fields
NTE
NOTES AND COMMENTS
3 fields•Used in 4 structures
OBR
OBSERVATION REQUEST
36 fields•Used in 3 structures
OBX
RESULT
12 fields•Used in 3 structures
ORC
COMMON ORDER
14 fields•Used in 3 structures
ORO
ORDER OTHER
4 fields•Used in 1 structure
PD1
PATIENT DEMOGRAPHICS
0 fields•Used in 1 structure
PID
PATIENT IDENTIFICATION
20 fields•Used in 29 structures
PR1
PROCEDURES
13 fields•Used in 1 structure
PV1
PATIENT VISIT
49 fields•Used in 29 structures
QRD
QUERY DEFINITION
12 fields•Used in 6 structures
QRF
QUERY FILTER
5 fields•Used in 4 structures
RX1
PHARMACY ORDER
30 fields•Used in 1 structure
UB1
UB82 DATA
23 fields•Used in 1 structure
URD
RESULTS/UPDATE DEFINITION
7 fields•Used in 1 structure
URS
UNSOLICITED SELECTION
5 fields•Used in 1 structure