Message Types
81 message types in HL7 v2.3.1
§2.16.1 Message Type Table:Message types identify the purpose and content category of an HL7 message. Each type (e.g., ADT, ORM, ORU) represents a specific clinical or administrative domain and groups related trigger events that share common processing requirements.
ACK
General Acknowledgment Message
105 response•General
ADR
ADT Response
1 response•ADT Response
ADT
ADT Message
50 trigger•Patient Admin
BAR
Add/Change Billing Account
4 trigger•Billing
CRM
Clinical Study Registration
8 trigger•Clinical Study
CSU
Unsolicited Clinical Study Data
4 trigger•Clinical Study
DFT
Detail Financial Transaction
DFT_P03•Financial
DOC
Document Response
1 response•Medical Docs
DSR
Display Response
12•Display Response
EDR
Enhanced Display Response
EDR_R07•Display Response
EQQ
Embedded Query Language Query
EQQ_Q04•Query
ERP
Event Replay Response
ERP_R09•Query Response
MCF
Delayed Acknowledgment
0 events•General
MDM
Documentation Message
11 trigger•Medical Docs
MFD
Master Files Delayed Application Acknowledgment
0 events•Master Files
MFK
Master Files Application Acknowledgment
11 response•Master Files
MFN
Master Files Notification
11 trigger•Master Files
MFQ
Master Files Query
6 trigger•Master Files
MFR
Master Files Query Response
6 response•Master Files
NMD
Network Management Data
NMD_N02•Application Mgmt
NMQ
Network Management Query
NMQ_N01•Application Mgmt
NMR
Network Management Response
1 response•Application Mgmt
NUL
No Message Required (for Referential Integrity)
134•General
ORF
Observ. Result/Record Response
1 response•Observations
ORM
Order Message
ORM_O01•Orders
ORR
Order Acknowledgment Message
ORR_O02•Order Response
ORU
Observ Result/Unsolicited
ORU_R01•Observations
OSQ
Order Status Query
OSQ_Q06•Order Status
OSR
Order Status Response
1 response•Order Status
PEX
Product Experience
2 trigger•Product Experience
PGL
Patient Goal
3 trigger•Patient Goal
PIN
Patient Insurance Information
PIN_I07•Patient Info
PPG
Patient Pathway (goal-oriented) Message
3 trigger•Pathway
PPP
Patient Pathway (problem-oriented) Message
3 trigger•Pathway
PPR
Patient Problem
3 trigger•Pathway
PPT
Patient Pathway (goal Oriented) Response
PPT_PCL•Pathway
PPV
Patient Goal Response
PPV_PCA•Patient Goal
PRR
Patient Problem Response
PRR_PC5•Problem
PTR
Patient Pathway (problem-oriented) Response
PTR_PCF•Pathway
QCK
Query General Acknowledgment
1 response•Query Ack
QRY
Query, Original Mode
10 trigger•Query
RAR
Pharmacy Administration Information
RAR_RAR•Pharmacy Response
RAS
Pharmacy Administration Message
RAS_O01•Pharmacy Admin
RCI
Return Clinical Information
1 response•Referral
RCL
Return Clinical List
1 response•Referral
RDE
Pharmacy Encoded Order Message
RDE_O01•Pharmacy
RDR
Pharmacy Dispense Information
RDR_RDR•Pharmacy Response
RDS
Pharmacy Dispense Message
RDS_O01•Pharmacy Dispense
REF
Patient Referral
4 trigger•Referral
RER
Pharmacy Encoded Order Information
RER_RER•Pharmacy Response
RGR
Pharmacy Dose Information
RGR_RGR•Pharmacy Response
RGV
Pharmacy Give Message
RGV_O01•Pharmacy
ROR
Pharmacy Prescription Order Response
ROR_R0R•Pharmacy Response
RPA
Return Patient Authorization
4 response•Referral Response
RPI
Return Patient Information
2 response•Referral Response
RPL
Return Patient Display List
1 response•Referral Response
RPR
Return Patient List
1 response•Referral Response
RQA
Request Patient Authorization
4 trigger•Referral
RQC
Request Clinical Information
2 trigger•Referral
RQI
Request Patient Information
3 trigger•Referral
RQP
Request Patient Demographics
RQP_I04•Referral
RQQ
Event Replay Query
RQQ_Q09•Query
RRA
Pharmacy Administration Acknowledgment
RRA_O02•Pharmacy Ack
RRD
Pharmacy Dispense Acknowledgment
RRD_O02•Pharmacy Ack
RRE
Pharmacy Encoded Order Acknowledgment
RRE_O02•Pharmacy Ack
RRG
Pharmacy Give Acknowledgment
RRG_O02•Pharmacy Ack
RRI
Return Patient Referral
4 response•Referral
SIU
Schedule Information Unsolicited
14 trigger•Scheduling
SPQ
Stored Procedure Request
SPQ_Q08•Query
SQM
Schedule Query
SQM_S25•Scheduling
SQR
Schedule Query Response
1 response•Scheduling
SRM
Schedule Request
11 trigger•Scheduling
SRR
Scheduled Request Response
11 response•Scheduling
SUR
Summary Product Experience Report
SUR_P09•Summary
TBR
Tabular Data Response
TBR_R08•Query Response
UDM
Unsolicited Display Message
UDM_Q05•Unsolicited
VQQ
Virtual Table Query
VQQ_Q07•Query
VXQ
Query for Vaccination Record
VXQ_V01•Immunization
VXR
Vaccination Query Record Response
VXR_V03•Immunization
VXU
Unsolicited Vaccination Record Update
VXU_V04•Immunization
VXX
Vaccination Query Response With Multiple PID Matches
VXX_V02•Immunization