| Code | Description | Comment | Version |
| ad | Admitting Provider | PV1-17 Admitting doctor | added v2.7 |
| ai | Assistant/Alternate Interpreter | | added v2.7 |
| ap | Administering Provider | RXA-10 Administering Provider | added v2.7 |
| ari | Assistant Result Interpreter | | added v2.7 |
| at | Attending Provider | PV1-7 Attending doctor | added v2.7 |
| aut | AUT Author/Event Initiator | ORC-19 Action By | added v2.7 |
| cp | Consulting Provider | | added v2.7 |
| dp | Dispensing Provider | RXD-10 Dispensing Provider | added v2.7 |
| ep | Entering Provider (probably not the same as transcriptionist) | ORC-10 Entered By | added v2.7 |
| equip | Equipment | | added v2.7 |
| fhcp | Family Health Care Professional | | added v2.7 |
| mdir | Medical Director | OBX-25 Performing Organization Medical Director | added v2.7 |
| op | Ordering Provider | ORC-12 Ordering Provider, OBR-16 Ordering Provider, RXO-14 Ordering Provider's DEA Number, RXE-13 Ordering Provider's DEA Number, ORC-24 Ordering Provider Address | added v2.7 |
| os | Outside Site(s) Where Observation May Be Performed | Replacing OM1-27 Outside Site(s) Where Observation May Be Performed | added v2.8.2 |
| pb | Packed by | | added v2.7 |
| ph | Pharmacist (not sure how to dissect Pharmacist/Treatment Supplier's Verifier ID) | RXE-14 Pharmacist/Treatment Supplier's Verifier ID | added v2.7 |
| pi | Primary Interpreter | | added v2.7 |
| po | Performing Organization | | added v2.7 |
| pomd | Performing Organization Medical Director | | added v2.7 |
| pp | Primary Care Provider | | added v2.7 |
| pri | Principal Result Interpreter | | added v2.7 |
| rct | Results Copies To | | added v2.7 |
| ro | Responsible Observer | OBX-16 Responsible Observer | added v2.7 |
| rp | Referring Provider | PV1-8 Referring doctor | added v2.7 |
| rt | Referred to Provider | | added v2.7 |
| sb | Send by | | added v2.7 |
| sc | Specimen Collector | OBR-10 Collector Identifier | added v2.7 |
| tn | Technician | | added v2.7 |
| tr | Transcriptionist | | added v2.7 |
| vp | Verifying Provider | ORC-11 Verified By | added v2.7 |
| vps | Verifying Pharmaceutical Supplier (not sure how to dissect Pharmacist/Treatment Supplier's Verifier ID) | RXE-14 Pharmacist/Treatment Supplier's Verifier ID | added v2.7 |
| vts | Verifying Treatment Supplier (not sure how to dissect Pharmacist/Treatment Supplier's Verifier ID) | RXE-14 Pharmacist/Treatment Supplier's Verifier ID | added v2.7 |
| way | Waypoint | | added v2.7 |
| wayr | Waypoint Recipient | | added v2.7 |