| 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 |