| Code | Description | Version |
| AF | Order/service refill request approval | added v2.3 |
| CA | Cancel order/service request | from v2.1 |
| CH | Child order/service | from v2.1 |
| CN | Combined result | from v2.1 |
| CR | Canceled as requested | added v2.2 |
| DC | Discontinue order/service request | from v2.1 |
| DE | Data errors | from v2.1 |
| DF | Order/service refill request denied | added v2.3 |
| DR | Discontinued as requested | from v2.1 |
| FU | Order/service refilled, unsolicited | added v2.3 |
| HD | Hold order request | from v2.1 |
| HR | On hold as requested | from v2.1 |
| LI | Link order/service to patient care problem or goal | added v2.3.1 |
| MC | Miscellaneous Charge - not associated with an order | added v2.6 |
| NA | Number assigned | from v2.1 |
| NW | New order/service | from v2.1 |
| NW or RO | Other application to filler application | added v2.6, removed after v2.6 |
| OC | Order/service canceled | added v2.2 |
| OD | Order/service discontinued | from v2.1 |
| OE | Order/service released | added v2.3 |
| OF | Order/service refilled as requested | added v2.3 |
| OH | Order/service held | added v2.2 |
| OK | Order/service accepted & OK | from v2.1 |
| OP | Notification of order for outside dispense | added v2.5 |
| OR | Released as requested | from v2.1 |
| PA | Parent order/service | from v2.1 |
| PR | Previous Results with new order/service | added v2.4 |
| PY | Notification of replacement order for outside dispense | added v2.5 |
| RE | Observations/Performed Service to follow | from v2.1 |
| RF | Refill order/service request | added v2.3 |
| RL | Release previous hold | added v2.2 |
| RO | Replacement order | from v2.1 |
| RP | Order/service replace request | from v2.1 |
| RQ | Replaced as requested | added v2.2 |
| RR | Request received | from v2.1 |
| RU | Replaced unsolicited | from v2.1 |
| SC | Status changed | added v2.2 |
| SN | Send order/service number | from v2.1 |
| SR | Response to send order/service status request | added v2.2 |
| SS | Send order/service status request | from v2.1 |
| UA | Unable to accept order/service | added v2.3 |
| UC | Unable to cancel | added v2.2 |
| UD | Unable to discontinue | from v2.1 |
| UF | Unable to refill | added v2.3 |
| UH | Unable to put on hold | from v2.1 |
| UM | Unable to replace | added v2.2 |
| UN | Unlink order/service from patient care problem or goal | added v2.3.1 |
| UR | Unable to release | from v2.1 |
| UX | Unable to change | from v2.1 |
| XO | Change order/service request | added v2.2 |
| XR | Changed as requested | from v2.1 |
| XX | Order/service changed, unsol. | from v2.1 |