Segments

63 segments in HL7 v2.2

§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 12 structures
ADD
ADDENDUM
1 field
AL1
PATIENT ALLERGY INFORMATION
6 fields•Used in 12 structures
BHS
BATCH HEADER
12 fields
BLG
BILLING
3 fields•Used in 1 structure
BTS
BATCH TRAILER
3 fields
DG1
DIAGNOSIS
16 fields•Used in 18 structures
DSC
CONTINUATION POINTER
1 field•Used in 19 structures
DSP
DISPLAY DATA
5 fields•Used in 5 structures
ERR
ERROR
1 field•Used in 58 structures
EVN
EVENT TYPE
5 fields•Used in 40 structures
FHS
FILE HEADER
12 fields
FT1
FINANCIAL TRANSACTION
23 fields•Used in 1 structure
FTS
FILE TRAILER
2 fields
GT1
GUARANTOR
21 fields•Used in 12 structures
IN1
INSURANCE
46 fields•Used in 12 structures
IN2
INSURANCE ADDITIONAL INFO
30 fields•Used in 12 structures
IN3
INSURANCE ADDITIONAL INFO-CERTIFICATION
25 fields•Used in 12 structures
MFA
MASTER FILE ACKNOWLEDGEMENT
5 fields•Used in 6 structures
MFE
MASTER FILE ENTRY
4 fields•Used in 6 structures
MFI
MASTER FILE IDENTIFICATION
6 fields•Used in 12 structures
MRG
MERGE PATIENT INFORMATION
4 fields•Used in 7 structures
MSA
MESSAGE ACKNOWLEDGMENT
6 fields•Used in 67 structures
MSH
MESSAGE HEADER
17 fields•Used in 126 structures
NCK
System Clock
1 field•Used in 3 structures
NK1
NEXT OF KIN
13 fields•Used in 12 structures
NPU
BED STATUS UPDATE
2 fields•Used in 1 structure
NSC
STATUS CHANGE
9 fields•Used in 3 structures
NST
Statistics
15 fields•Used in 3 structures
NTE
NOTES AND COMMENTS
3 fields•Used in 7 structures
OBR
OBSERVATION REQUEST
36 fields•Used in 4 structures
OBX
OBSERVATION RESULT
16 fields•Used in 35 structures
ODS
DIETARY ORDERS, SUPPLEMENTS, and PREFERENCES
4 fields•Used in 1 structure
ODT
DIET TRAY INSTRUCTION
3 fields•Used in 1 structure
OM1
GENERAL - fields that apply to most observations
42 fields
OM2
NUMERIC OBSERVATION
11 fields
OM3
CATEGORICAL TEST/OBSERVATION
8 fields
OM4
OBSERVATION that require specimens
15 fields
OM5
OBSERVATION BATTERIES
4 fields
OM6
OBSERVATIONS that are calculated from other obersvations
3 fields
ORC
COMMOM ORDER
19 fields•Used in 4 structures
PID
PATIENT IDENTIFICATION
27 fields•Used in 43 structures
PR1
PROCEDURES
14 fields•Used in 12 structures
PRA
practitioner detail
7 fields
PV1
PATIENT VISIT
50 fields•Used in 38 structures
PV2
PATIENT VISIT - additional information
9 fields•Used in 31 structures
QRD
QUERY DEFINITION
12 fields•Used in 19 structures
QRF
QUERY FILTER
8 fields•Used in 17 structures
RQ1
REQUISITION DETAIL-1
7 fields•Used in 1 structure
RQD
REQUISITION DETAIL
10 fields•Used in 1 structure
RXA
PHARMACY AADMINISTRATION
12 fields
RXC
PHARMACY COMPONENT ORDER
4 fields
RXD
PHARMACY DISPENSE
15 fields
RXE
PHARMACY ENCODED ORDER
24 fields
RXG
PHARMACY GIVE
16 fields
RXO
PHARMACY PRESCRIPTION ORDER
17 fields•Used in 1 structure
RXR
PHARMACY ROUTE
4 fields
STF
staff identification segment
16 fields
UB1
UB82 DATA
23 fields•Used in 12 structures
UB2
UB92 DATA
16 fields•Used in 12 structures
URD
RESULTS/UPDATE DEFINITION
7 fields•Used in 1 structure
URS
UNSOLICITED SELECTION
8 fields•Used in 1 structure
Zxx
any Z segment
0 fields•Used in 6 structures•Wildcard