| Code | Description | Version |
| ADV | Advice/diagnosis | from v2.1, removed after v2.6 |
| ANU | Nursing unit lookup (returns patients in beds, excluding empty beds) | from v2.1, removed after v2.6 |
| APA | Account number query, return matching visit | added v2.2, removed after v2.6 |
| APM | Medical record number query, returns visits for a medical record number | added v2.2, removed after v2.6 |
| APN | Patient name lookup | from v2.1, removed after v2.6 |
| APP | Physician lookup | added v2.2, removed after v2.6 |
| ARN | Nursing unit lookup (returns patients in beds, including empty beds) | added v2.2, removed after v2.6 |
| CAN | Cancel. Used to cancel a query | from v2.1, removed after v2.6 |
| DEM | Demographics | from v2.1, removed after v2.6 |
| FIN | Financial | added v2.2, removed after v2.6 |
| GID | Generate new identifier | added v2.4, removed after v2.6 |
| GOL | Goals | added v2.3, removed after v2.6 |
| MFQ | Master file query | added v2.2, removed after v2.2 |
| MRI | Most recent inpatient | from v2.1, removed after v2.6 |
| MRO | Most recent outpatient | from v2.1, removed after v2.6 |
| NCK | Network clock | added v2.2, removed after v2.6 |
| NSC | Network status change | added v2.2, removed after v2.6 |
| NST | Network statistic | added v2.2, removed after v2.6 |
| ORD | Order | added v2.2, removed after v2.6 |
| OTH | Other | from v2.1, removed after v2.6 |
| PRB | Problems | added v2.3, removed after v2.6 |
| PRO | Procedure | from v2.1, removed after v2.6 |
| RAR | Pharmacy administration information | added v2.2, removed after v2.6 |
| RDR | Pharmacy dispense information | added v2.2, removed after v2.6 |
| RER | Pharmacy encoded order information | added v2.2, removed after v2.6 |
| RES | Result | from v2.1, removed after v2.6 |
| RGR | Pharmacy give information | added v2.2, removed after v2.6 |
| ROR | Pharmacy prescription information | added v2.2, removed after v2.6 |
| SAL | All schedule related information, including open slots, booked slots, blocked slots | added v2.3.1, removed after v2.6 |
| SBK | Booked slots on the identified schedule | added v2.3.1, removed after v2.6 |
| SBL | Blocked slots on the identified schedule | added v2.3.1, removed after v2.6 |
| SOF | First open slot on the identified schedule after the start date/tiem | added v2.4, removed after v2.6 |
| SOP | Open slots on the identified schedule between the begin and end of the start date/time range | added v2.3.1, removed after v2.6 |
| SSA | Time slots available for a single appointment | added v2.3.1, removed after v2.6 |
| SSR | Time slots available for a recurring appointment | added v2.3.1, removed after v2.6 |
| STA | Status | from v2.1, removed after v2.6 |
| VXI | Vaccine Information | added v2.3, removed after v2.6 |
| XID | Get cross-referenced identifiers | added v2.4, removed after v2.6 |