Segments

113 segments in HL7 v2.3.1

§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
6 fields•Used in 18 structures
ADD
Addendum
1 field
AIG
Appointment Information - General Resource
14 fields•Used in 4 structures
AIL
Appointment Information - Location Resource
12 fields•Used in 4 structures
AIP
Appointment Information - Personnel Resource
12 fields•Used in 4 structures
AIS
Appointment Information - Service
10 fields•Used in 4 structures
AL1
Patient allergy information
6 fields•Used in 28 structures
APR
Appointment Preferences
5 fields•Used in 1 structure
ARQ
Appointment Request
23 fields•Used in 1 structure
AUT
Authorization Information
10 fields•Used in 4 structures
BHS
Batch header
12 fields
BLG
Billing Segment
3 fields•Used in 4 structures
BTS
Batch trailer segment
3 fields
CDM
Charge Description Master
13 fields•Used in 1 structure
CM0
Clinical Study Master
11 fields•Used in 1 structure
CM1
CM1 - clinical study phase master segment
3 fields•Used in 1 structure
CM2
Clinical Study Schedule Master
4 fields•Used in 1 structure
CSP
Clinical Study Phase
4 fields•Used in 3 structures
CSR
Clinical Study Registration
16 fields•Used in 3 structures
CSS
Clinical Study Data Schedule
3 fields•Used in 1 structure
CTD
Contact Data
7 fields•Used in 17 structures
CTI
Clinical Trial Identification
3 fields•Used in 6 structures
DB1
Disability Segment
8 fields•Used in 36 structures
DG1
Diagnosis
19 fields•Used in 33 structures
DRG
Diagnosis Related Group
10 fields•Used in 23 structures
DSC
Continuation pointer segment
1 field•Used in 27 structures
DSP
Display Data
5 fields•Used in 6 structures
EQL
Embedded Query Language
4 fields•Used in 1 structure
ERQ
Event Replay Query
3 fields•Used in 2 structures
ERR
Error
1 field•Used in 103 structures
EVN
Event Type
6 fields•Used in 69 structures
FAC
Facility
12 fields•Used in 1 structure
FHS
File Header
12 fields
FT1
Financial Transaction
26 fields•Used in 1 structure
FTS
File Trailer
2 fields
GOL
Goal Detail
21 fields•Used in 8 structures
GT1
Guarantor
55 fields•Used in 26 structures
Hxx
any HL7 segment
0 fields•Used in 1 structure•Wildcard
IN1
Insurance
49 fields•Used in 25 structures
IN2
Insurance Additional Information
72 fields•Used in 25 structures
IN3
Insurance Additional Information, Certification
25 fields•Used in 25 structures
LCC
Location Charge Code
4 fields•Used in 1 structure
LCH
Location Characteristic
5 fields•Used in 1 structure
LDP
Location Department
11 fields•Used in 1 structure
LOC
Location Identification
8 fields•Used in 1 structure
LRL
Location Relationship
6 fields•Used in 1 structure
MFA
Master File Acknowledgment
6 fields•Used in 4 structures
MFE
Master File Entry
5 fields•Used in 11 structures
MFI
Master File Identification
6 fields•Used in 15 structures
MRG
Merge patient information
7 fields•Used in 20 structures
MSA
Message Acknowledgment
6 fields•Used in 117 structures
MSH
Message Header
20 fields•Used in 243 structures
NCK
System Clock
1 field•Used in 3 structures
NK1
Next of Kin / Associated Parties
37 fields•Used in 30 structures
NPU
Bed status update
2 fields•Used in 1 structure
NSC
Application status change
9 fields•Used in 3 structures
NST
Application control level statistics
15 fields•Used in 3 structures
NTE
Notes and Comments
4 fields•Used in 56 structures
OBR
Observation Request
45 fields•Used in 18 structures
OBX
Observation/Result
17 fields•Used in 69 structures
ODS
Dietary Orders, Supplements, and Preferences
4 fields•Used in 4 structures
ODT
Diet Tray Instructions
3 fields•Used in 4 structures
OM1
General Segment
47 fields•Used in 5 structures
OM2
Numeric Observation
10 fields•Used in 2 structures
OM3
Categorical Service/Test/Observation
7 fields•Used in 2 structures
OM4
Observations that Require Specimens
14 fields•Used in 3 structures
OM5
Observation Batteries (Sets)
3 fields•Used in 1 structure
OM6
Observations that are Calculated from Other Observations
2 fields•Used in 1 structure
ORC
Common Order
24 fields•Used in 32 structures
PCR
Possible Causal Relationship
23 fields•Used in 1 structure
PD1
Patient Additional Demographic
12 fields•Used in 68 structures
PDC
Product Detail Country
15 fields•Used in 1 structure
PEO
Product Experience Observation
25 fields•Used in 1 structure
PES
Product Experience Sender
13 fields•Used in 1 structure
PID
Patient identification
30 fields•Used in 122 structures
PR1
Procedures
16 fields•Used in 19 structures
PRA
Practitioner Detail
8 fields•Used in 1 structure
PRB
Problem Detail
25 fields•Used in 9 structures
PRC
Pricing
18 fields•Used in 1 structure
PRD
Provider Data
9 fields•Used in 17 structures
PSH
Product Summary Header
14 fields•Used in 1 structure
PTH
Pathway
6 fields•Used in 8 structures
PV1
Patient visit
52 fields•Used in 88 structures
PV2
Patient visit - additional information
37 fields•Used in 63 structures
QAK
Query Acknowledgement
2 fields•Used in 15 structures
QRD
QRD - original-style query definition segment
12 fields•Used in 37 structures
QRF
Original Style Query Filter
9 fields•Used in 31 structures
RDF
Table Row Definition
2 fields•Used in 3 structures
RDT
Table Row Data
1 field•Used in 1 structure
RF1
Referral Infomation
11 fields•Used in 4 structures
RGS
Resource Group
3 fields•Used in 4 structures
ROL
Role
8 fields•Used in 23 structures
RQ1
Requisition Detail-1
7 fields•Used in 4 structures
RQD
Requisition Detail
10 fields•Used in 6 structures
RXA
Pharmacy/Treatment Administration
22 fields•Used in 6 structures
RXC
Pharmacy/Treatment Component Order
6 fields•Used in 11 structures
RXD
Pharmacy/Treatment Dispense
24 fields•Used in 2 structures
RXE
Pharmacy/Treatment Encoded Order
30 fields•Used in 9 structures
RXG
Pharmacy/Treatment Give
22 fields•Used in 2 structures
RXO
Pharmacy/Treatment Order
23 fields•Used in 17 structures
RXR
Pharmacy/Treatment Route
5 fields•Used in 15 structures
SCH
Scheduling Activity Information
25 fields•Used in 3 structures
SPR
Stored Procedure Request Definition
4 fields•Used in 1 structure
STF
Staff Identification
26 fields•Used in 1 structure
TXA
Document notification segment
23 fields•Used in 12 structures
UB1
UB1 - UB82 data segment
23 fields•Used in 13 structures
UB2
UB2 - UB92 data segment
17 fields•Used in 13 structures
URD
Results/update Definition
7 fields•Used in 1 structure
URS
Unsolicited Selection
9 fields•Used in 1 structure
VAR
Variance
6 fields•Used in 8 structures
VTQ
Virtual Table Query Request
5 fields•Used in 1 structure
ZL7
diverses
0 fields•Wildcard
Zxx
any Z segment
0 fields•Used in 2 structures•Wildcard