Message Types
127 message types in HL7 v2.6
§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
145 response•General
ADR
ADT Response
1 response•ADT Response
ADT
ADT Message
57 trigger•Patient Admin
BAR
Add/Change Billing Account
6 trigger•Billing
BPS
Blood Product Dispense Status Message
BPS_O29•Blood Product
BRP
Blood Product Dispense Status Acknowledgement Message
BRP_O30•Blood Product
BRT
Blood Product Transfusion/Disposition Acknowledgement Message
BRT_O32•Blood Product
BTS
Blood Product Transfusion/Disposition Message
BTS_O31•Blood Product
CRM
Clinical Study Registration Message
8 trigger•Clinical Study
CSU
Unsolicited Study Data Message
4 trigger•Clinical Study
DFT
Detail Financial Transactions
2 trigger•Financial
DOC
Document Response
1 response•Medical Docs
DSR
Display Response
11•Display Response
EAC
Automated Equipment Command Message
EAC_U07•Equipment
EAN
Automated Equipment Notification Message
EAN_U09•Equipment
EAR
Automated Equipment Response Message
EAR_U08•Equipment
EHC
Health Care Invoice
10 trigger•Financial
ESR
Automated Equipment Status Update Acknowledgment Message
ESR_U02•Equipment Status
ESU
Automated Equipment Status Update Message
ESU_U01•Equipment Status
INR
Automated Equipment Inventory Request Message
INR_U06•Inventory
INU
Automated Equipment Inventory Update Message
INU_U05•Inventory
LSR
Automated Equipment Log/Service Request Message
LSR_U13•Equipment
LSU
Automated Equipment Log/Service Update Message
LSU_U12•Equipment
MDM
Medical Document Management
11 trigger•Medical Docs
MFK
Master Files Application Acknowledgment
17 response•Master Files
MFN
Master Files Notification
17 trigger•Master Files
MFQ
Master Files Query
0 events•Master Files
MFR
Master Files Response
0 events•Master Files
NMD
Application Management Data Message
NMD_N02•Application Mgmt
NMQ
Application Management Query Message
NMQ_N01•Application Mgmt
NMR
Application Management Response Message
1 response•Application Mgmt
NUL
No Message Required (for Referential Integrity)
1136•General
OMB
Blood Product Order Message
OMB_O27•Blood Product
OMD
Dietary Order
OMD_O03•Diet Orders
OMG
General Clinical Order Message
OMG_O19•General Orders
OMI
Imaging Order
OMI_O23•Imaging Orders
OML
Laboratory Order Message
3 trigger•Lab Orders
OMN
Non-stock Requisition Order Message
OMN_O07•Non-Stock Orders
OMP
Pharmacy/Treatment Order Message
OMP_O09•Pharmacy
OMS
Stock Requisition Order Message
OMS_O05•Stock Requisition
OPL
Population/Location-Based Laboratory Order Message
OPL_O37•Lab Orders
OPR
Population/Location-Based Laboratory Order Acknowledgment Message
OPR_O38•Lab Orders
OPU
Unsolicited Population/Location-Based Laboratory Observation Message
OPU_R25•Lab Observations
ORB
Blood Product Order Acknowledgement Message
ORB_O28•Blood Product
ORD
Dietary Order Acknowledgment Message
ORD_O04•Diet Orders
ORF
Query for Results of Observation
ORF_R04•Observations
ORG
General Clinical Order Acknowledgment Message
ORG_O20•General Orders
ORI
Imaging Order Acknowledgement Message
ORI_O24•Imaging Orders
ORL
Laboratory Acknowledgment Message (unsolicited)
3 trigger•Lab Orders
ORM
Pharmacy/Treatment Order Message
ORM_O01•Orders
ORN
Non-stock Requisition - General Order Acknowledgment Message
ORN_O08•Non-Stock Orders
ORP
Pharmacy/Treatment Order Acknowledgment Message
ORP_O10•Pharmacy Ack
ORR
General Order Response Message Response to Any ORM
ORR_O02•Order Response
ORS
Stock Requisition - Order Acknowledgment Message
ORS_O06•Stock Requisition
ORU
Unsolicited Transmission of an Observation Message
4 trigger•Observations
OSQ
Query Response for Order Status
OSQ_Q06•Order Status
OSR
Query Response for Order Status
1 response•Order Status
OUL
Unsolicited Laboratory Observation Message
4 trigger•Lab Observations
PEX
Product Experience Message
2 trigger•Product Experience
PGL
Patient Goal Message
3 trigger•Patient Goal
PIN
Patient Insurance Information
PIN_I07•Patient Info
PMU
Add Personnel Record
8 trigger•Personnel
PPG
Patient Pathway Message (goal-oriented)
3 trigger•Pathway
PPP
Patient Pathway Message (problem-oriented)
3 trigger•Pathway
PPR
Patient Problem Message
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
QBP
Query by Parameter
25 trigger•Query
QCK
Query General Acknowledgment
1 response•Query Ack
QCN
Cancel Query
QCN_J01•Query Cancel
QRY
Query, Original Mode
14 trigger•Query
QSB
Create Subscription
2 trigger•Subscription
QSX
Cancel Subscription/Acknowledge Message
QSX_J02•Subscription Cancel
QVR
Query for Previous Events
QVR_Q17•Query
RAR
Pharmacy/Treatment Administration Information
RAR_RAR•Pharmacy Response
RAS
Pharmacy/Treatment Administration Message
RAS_O17•Pharmacy Admin
RCI
Return Clinical Information
1 response•Referral
RCL
Return Clinical List
1 response•Referral
RDE
Pharmacy/Treatment Encoded Order Message
2 trigger•Pharmacy
RDR
Pharmacy/Treatment Dispense Information
1 response•Pharmacy Response
RDS
Pharmacy/Treatment Dispense Message
RDS_O13•Pharmacy Dispense
RDY
Display Based Response
3 trigger•Display Response
REF
Patient Referral
4 trigger•Referral
RER
Pharmacy/Treatment Encoded Order Information
RER_RER•Pharmacy Response
RGR
Pharmacy/Treatment Dose Information
RGR_RGR•Pharmacy Response
RGV
Pharmacy/Treatment Give Message
RGV_O15•Pharmacy
ROR
Pharmacy/Treatment Order Response
ROR_ROR•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
RRA
Pharmacy/Treatment Administration Acknowledgment Message
RRA_O18•Pharmacy Ack
RRD
Pharmacy/Treatment Dispense Acknowledgment Message
RRD_O14•Pharmacy Ack
RRE
Pharmacy/Treatment Encoded Order Acknowledgment Message
2 trigger•Pharmacy Ack
RRG
Pharmacy/Treatment Give Acknowledgment Message
RRG_O16•Pharmacy Ack
RRI
Return Referral Information
4 response•Referral
RSP
Segment Pattern Response
123•Response
RTB
Tabular Response
7 trigger•Query Response
SCN
Notification of Anti-Microbial Device Cycle Data
SCN_S37•Sterilization
SDN
Notification of Anti-Microbial Device Data
SDN_S36•Sterilization
SDR
Sterilization Anti-microbial Device Data Request
SDR_S31•Sterilization
SIU
Schedule Information Unsolicited
14 trigger•Scheduling
SLN
Notification of New Sterilization Lot
2 trigger•Sterilization
SLR
Sterilization Lot Request
2 trigger•Sterilization
SMD
Sterilization Anti-microbial Device Cycle Data Request
SMD_S32•Sterilization
SQM
Schedule Query Message
SQM_S25•Scheduling
SQR
Schedule Query Response
1 response•Scheduling
SRM
Schedule Request Message
11 trigger•Scheduling
SRR
Scheduled Request Response
11 response•Scheduling
SSR
Specimen Status Request Message
SSR_U04•Lab Automation
SSU
Specimen Status Update Message
SSU_U03•Lab Automation
STC
Notification of Sterilization Configuration
STC_S33•Sterilization
STI
Sterilization Item Request
STI_S30•Sterilization
SUR
Summary Product Experience Report
SUR_P09•Summary
TCR
Automated Equipment Test Code Settings Request Message
TCR_U11•Test Code
TCU
Automated Equipment Test Code Settings Update Message
TCU_U10•Test Code
UDM
Unsolicited Display Update Message
UDM_Q05•Unsolicited
VXQ
Query for Vaccination Record
VXQ_V01•Immunization
VXR
Vaccination Record Response
VXR_V03•Immunization
VXU
Unsolicited Vaccination Record Update
VXU_V04•Immunization
VXX
Response for Vaccination Query With Multiple PID Matches
VXX_V02•Immunization