| 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 |