Message Types
116 message types in HL7 v2.8.2
§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
1136•General
ADT
ADT Message
49 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
CCF
Collaborative Care Fetch
CCF_I22•Collaborative Care
CCI
Collaborative Care Information
1 response•Collaborative Care
CCM
Collaborative Care Message
CCM_I21•Collaborative Care
CCQ
Collaborative Care Referral
CCQ_I19•Collaborative Care
CCR
Collaborative Care Referral (Events I16, I17 and I18)
3 trigger•Collaborative Care
CCU
Collaborative Care Referral
CCU_I20•Collaborative Care
CQU
Collaborative Care Referral
1 response•Collaborative Care
CRM
Clinical Study Registration Message
8 trigger•Clinical Study
CSU
Unsolicited Study Data Message
4 trigger•Clinical Study
DBC
Create Donor Record
1 response•Blood Donation
DBU
Update Donor Record
1 response•Blood Donation
DEL
Donor Eligibility
DEL_O46•Blood Donation
DEO
Donor Eligibility Observation
DEO_O45•Blood Donation
DER
Donor Eligibility Request
DER_O44•Blood Donation
DFT
Detail Financial Transactions
2 trigger•Financial
DPR
Donation Procedure
DPR_O48•Blood Donation
DRC
Donor Request to Collect
DRC_O47•Blood Donation
DRG
Donor Registration
1 response•Blood Donation
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
214•Master Files
MFN
Master Files Notification
14 trigger•Master Files
NMD
Application Management Data Message
NMD_N02•Application Mgmt
NUL
NUL Message
4126•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
4 trigger•Lab Orders
OMN
Non-stock Requisition Order Message
OMN_O07•Non-Stock Orders
OMP
Pharmacy/Treatment Order Message
OMP_O09•Pharmacy
OMQ
General Order Message With Document Payload
OMQ_O42•General Orders
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
ORA
Observation Report Acknowledgment
2 trigger•Observations
ORB
Blood Product Order Acknowledgement Message
ORB_O28•Blood Product
ORD
Dietary Order Acknowledgment Message
ORD_O04•Diet Orders
ORG
General Clinical Order Acknowledgment Message
ORG_O20•General Orders
ORI
Imaging Order Acknowledgement Message
ORI_O24•Imaging Orders
ORL
Laboratory Acknowledgment Message (unsolicited)
44•Lab Orders
ORN
Non-stock Requisition - General Order Acknowledgment Message
ORN_O08•Non-Stock Orders
ORP
Pharmacy/Treatment Order Acknowledgment Message
ORP_O10•Pharmacy Ack
ORS
Stock Requisition - Order Acknowledgment Message
ORS_O06•Stock Requisition
ORU
Unsolicited Transmission of an Observation Message
4 trigger•Observations
ORX
General Order Message With Document Payload Acknowledgement
ORX_O43•Order Response
OSM
Specimen Shipment Message
OSM_R26•Specimen Shipment
OSU
Order Status Update
OSU_O41•Order Status
OUL
Unsolicited Laboratory Observation Message
3 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
QBP
Query by Parameter
18 trigger•Query
QCN
Cancel Query
QCN_J01•Query Cancel
QSB
Create Subscription
2 trigger•Subscription
QSX
Cancel Subscription/Acknowledge Message
QSX_J02•Subscription Cancel
QVR
Query for Previous Events
QVR_Q17•Query
RAS
Pharmacy/Treatment Administration Message
RAS_O17•Pharmacy Admin
RDE
Pharmacy/Treatment Encoded Order Message
2 trigger•Pharmacy
RDR
Pharmacy/Treatment Dispense Information
RDR_RDR•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
RGV
Pharmacy/Treatment Give Message
RGV_O15•Pharmacy
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
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
153•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
15 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
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
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
VXU
Unsolicited Vaccination Record Update
VXU_V04•Immunization