| Code | Display | Comments |
|---|
 ACK | General acknowledgment message | |
| ADR | ADT response | |
| ARD | Ancillary RPT (display) (for backward compatibility only) | |
| ADT | ADT message | |
| BAR | Add/change billing account | |
| BPS | Blood product dispense status message | |
| CNQ | Cancel query | |
| BRP | Blood product dispense status acknowledgement message | |
| BRT | Blood product transfusion/disposition acknowledgement message | |
| BTS | Blood product transfusion/disposition message | |
| CCF | Collaborative Care Fetch | |
| CCI | Collaborative Care Information | |
| CCM | Collaborative Care Message | |
| CCQ | Collaborative Care Referral | |
| ERQ | Event replay query | |
| CCU | Collaborative Care Referral | |
| CQU | Collaborative Care Referral | |
| CRM | Clinical study registration message | |
| CSU | Unsolicited study data message | |
| EDR | Enhanced display response | |
| DBC | Create Donor Record | |
| EQQ | Embedded query language query | |
| DBU | Update Donor Record | |
| ERP | Event replay response | |
| DEL | Donor Eligibility | |
| DEO | Donor Eligibility Observation | |
| DER | Donor Eligibility Request | |
| DFT | Detail financial transactions | |
| DOC | Document response | |
| DPR | Donation Procedure | |
| DRC | Donor Request to Collect | |
| DSR | Display response | |
| MCF | Delayed Acknowledgment (Retained for backward compatibility only) | |
| EAC | Automated equipment command message | |
| EAN | Automated equipment notification message | |
| EAR | Automated equipment response message | |
| EHC | Health Care Invoice | |
| ESR | Automated equipment status update acknowledgment message | |
| ESU | Automated equipment status update message | |
| INR | Automated equipment inventory request message | |
| INU | Automated equipment inventory update message | |
| LSR | Automated equipment log/service request message | |
| LSU | Automated equipment log/service update message | |
| MDM | Medical document management | |
| MFD | Master files delayed application acknowledgment | |
| MFK | Master files application acknowledgment | |
| MFN | Master files notification | |
| MFQ | Master files query | |
| MFR | Master files response | |
| NMD | Application management data message | |
| NMQ | Application management query message | |
| NMR | Application management response message | |
| OMB | Blood product order message | |
| OMD | Dietary order | |
| OMG | General clinical order message | |
| OMI | Imaging order | |
| ROC | Request clinical information | |
| ROD | Request pateint demographics | |
| OML | Laboratory order message | |
| OMN | Non-stock requisition order message | |
| OMP | Pharmacy/treatment order message | |
| OMQ | General order message with document payload | |
| OMS | Stock requisition order message | |
| OPL | Population/Location-Based Laboratory Order Message | |
| OPR | Population/Location-Based Laboratory Order Acknowledgment Message | |
| OPU | Unsolicited Population/Location-Based Laboratory Observation Message | |
| ORA | Observation Report Acknowledgment | |
| ORB | Blood product order acknowledgement message | |
| ORD | Dietary order acknowledgment message | |
| ORF | Query for results of observation | |
| ORG | General clinical order acknowledgment message | |
| ORI | Imaging order acknowledgement message | |
| ORL | Laboratory acknowledgment message (unsolicited) | |
| ORM | Pharmacy/treatment order message | |
| ORN | Non-stock requisition - General order acknowledgment message | |
| ORP | Pharmacy/treatment order acknowledgment message | |
| ORR | General order response message response to any ORM | |
| ORS | Stock requisition - Order acknowledgment message | |
| ORU | Unsolicited transmission of an observation message | |
| ORX | General Order Message with Document Payload Acknowledgement | |
| OSM | Specimen Shipment Message | |
| OSQ | Query response for order status | |
| OSR | Query response for order status | |
| OSU | Order status update | |
| OUL | Unsolicited laboratory observation message | |
| PEX | Product experience message | |
| PGL | Patient goal message | |
| PIN | Patient insurance information | |
| PMU | Add personnel record | |
| PPG | Patient pathway message (goal-oriented) | |
| PPP | Patient pathway message (problem-oriented) | |
| PPR | Patient problem message | |
| PPT | Patient pathway goal-oriented response | |
| PPV | Patient goal response | |
| PRR | Patient problem response | |
| PTR | Patient pathway problem-oriented response | |
| QBP | Query by parameter | |
| QCK | Query general acknowledgment | |
| QCN | Cancel query | |
| QRY | Query, original mode | |
| QSB | Create subscription | |
| QSX | Cancel subscription/acknowledge message | |
| QVR | Query for previous events | |
| RAR | Pharmacy/treatment administration information | |
| RAS | Pharmacy/treatment administration message | |
| RCI | Return clinical information | |
| RCL | Return clinical list | |
| RQQ | Event replay query | |
| RDE | Pharmacy/treatment encoded order message | |
| RDR | Pharmacy/treatment dispense information | |
| RDS | Pharmacy/treatment dispense message | |
| RDY | Display based response | |
| REF | Patient referral | |
| RER | Pharmacy/treatment encoded order information | |
| RGR | Pharmacy/treatment dose information | |
| RGV | Pharmacy/treatment give message | |
| ROR | Pharmacy/treatment order response | |
| SPQ | Stored procedure request | |
| RPA | Return patient authorization | |
| RPI | Return patient information | |
| RPL | Return patient display list | |
| RPR | Return patient list | |
| RQA | Request patient authorization | |
| RQC | Request clinical information | |
| RQI | Request patient information | |
| RQP | Request patient demographics | |
| RRA | Pharmacy/treatment administration acknowledgment message | |
| RRD | Pharmacy/treatment dispense acknowledgment message | |
| RRE | Pharmacy/treatment encoded order acknowledgment message | |
| RRG | Pharmacy/treatment give acknowledgment message | |
| VQQ | Virtual table query | |
| RRI | Return referral information | |
| RSP | Segment pattern response | |
| RTB | Tabular response | |
| SCN | Notification of Anti-Microbial Device Cycle Data | |
| SDN | Notification of Anti-Microbial Device Data | |
| SDR | Sterilization anti-microbial device data request | |
| SET | Specimen Event Tracking | |
| SIU | Schedule information unsolicited | |
| SLN | Notification of New Sterilization Lot | |
| SLR | Sterilization lot request | |
| SMD | Sterilization anti-microbial device cycle data request | |
| SQM | Schedule query message | |
| SQR | Schedule query response | |
| SRM | Schedule request message | |
| SRR | Scheduled request response | |
| SSR | Specimen status request message | |
| SSU | Specimen status update message | |
| STC | Notification of Sterilization Configuration | |
| STI | Sterilization item request | |
| SUR | Summary product experience report | |
| TBR | Tabular data response | |
| TCR | Automated equipment test code settings request message | |
| TCU | Automated equipment test code settings update message | |
| UDM | Unsolicited display update message | |
| VXQ | Query for vaccination record | |
| VXR | Vaccination record response | |
| VXU | Unsolicited vaccination record update | |
| VXX | Response for vaccination query with multiple PID matches | |