Message Types
36 message types in HL7 v2.2
§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 Acknowledgement Message
52 response•General
ADR
ADT Response
1 response•ADT Response
ADT
ADT Message
36 trigger•Patient Admin
BAR
Add / Change Billing Account
2 trigger•Billing
DFT
Detail Financial Transaction
DFT_P03•Financial
DSR
Display Response
22•Display Response
MCF
Delayed Acknowledgement
0 events•General
MFD
Master Files Delayed Application Acknowledgement
3 trigger•Master Files
MFK
Master File Application Acknowledgement
3 response•Master Files
MFN
Master Files Notification
3 trigger•Master Files
MFQ
Master Files Query
3 trigger•Master Files
MFR
Master Files Response
3 response•Master Files
NMD
Network Management Data
NMD_N01•Application Mgmt
NMQ
Network Management Query
NMQ_N02•Application Mgmt
NMR
Network Management Response
1 response•Application Mgmt
NUL
No Message Required (for Referential Integrity)
0 events•General
ORF
Observational Result (record Response)
ORF_R04•Observations
ORM
Order Message
ORM_O01•Orders
ORR
Order Acknowledgement Message
ORR_O02•Order Response
ORU
Observational Result (unsolicited)
ORU_R01•Observations
OSQ
Order Status Query
0 events•Order Status
QRY
Query
5 trigger•Query
RAR
Pharmacy Administration Information
0 events•Pharmacy Response
RAS
Pharmacy Administration Message
0 events•Pharmacy Admin
RDE
Pharmacy Encoded Order Message
0 events•Pharmacy
RDR
Pharmacy Dispense Information
0 events•Pharmacy Response
RDS
Pharmacy Dispense Message
0 events•Pharmacy Dispense
RER
Pharmacy Encoded Order Information
0 events•Pharmacy Response
RGR
Pharmacy Dose Information
0 events•Pharmacy Response
RGV
Pharmacy Give Message
0 events•Pharmacy
ROR
Pharmacy Prescription Order Response
0 events•Pharmacy Response
RRA
Pharmacy Administration Acknowledgment
0 events•Pharmacy Ack
RRD
Pharmacy Dispense Acknowledgment
0 events•Pharmacy Ack
RRE
Pharmacy Encoded Order Acknowledgment
0 events•Pharmacy Ack
RRG
Pharmacy Give Acknowledgment
0 events•Pharmacy Ack
UDM
Unsolicited Display Message
UDM_Q05•Unsolicited