This code system http://terminology.hl7.org/CodeSystem/v2-0906 defines the following codes:
| Code | Display | Definition |
| A | ASAP - As soon as possible, next highest priority after stat | ASAP - As soon as possible, next highest priority after stat |
| CR | Callback results - filler should contact the placer as soon as results are available, even for preliminary results | Callback results - filler should contact the placer as soon as results are available, even for preliminary results |
| CS | Callback for scheduling - Filler should contact the placer (or target) to schedule the service. | Callback for scheduling - Filler should contact the placer (or target) to schedule the service. |
| CSP | Callback placer for scheduling - filler should contact the placer to schedule the service | Callback placer for scheduling - filler should contact the placer to schedule the service |
| CSR | Contact recipient for scheduling - Filler should contact the service recipient (target) to schedule the service | Contact recipient for scheduling - Filler should contact the service recipient (target) to schedule the service |
| EL | Elective - Beneficial to the patient but not essential for survival. | Elective - Beneficial to the patient but not essential for survival. |
| EM | Emergency - An unforeseen combination of circumstances or the resulting state that calls for immediate action | Emergency - An unforeseen combination of circumstances or the resulting state that calls for immediate action |
| P | Preop - Used to indicate that a service is to be performed prior to a scheduled surgery. When ordering a service and using the pre-op priority, a check is done to see the amount of time that must be allowed for performance of the service. When the order | Preop – Used to indicate that a service is to be performed prior to a scheduled surgery. When ordering a service and using the pre-op priority, a check is done to see the amount of time that must be allowed for performance of the service. When the order is placed, a message can be generated indicating the time needed for the service so that it is not ordered in conflict with a scheduled operation. |
| PRN | As needed - An "as needed" order should be accompanied by a description of what constitutes a need. This description is represented by an observation service predicate as a precondition. | As needed - An "as needed" order should be accompanied by a description of what constitutes a need. This description is represented by an observation service predicate as a precondition. |
| R | Routine - Routine service, do at usual work hours | Routine - Routine service, do at usual work hours |
| RR | Rush reporting - A report should be prepared and sent as quickly as possible | Rush reporting - A report should be prepared and sent as quickly as possible |
| S | Stat - With highest priority (e.g. emergency). | Stat - With highest priority (e.g. emergency). |
| T | Timing critical - It is critical to come as close as possible to the requested time (e.g. for a through antimicrobial level). | Timing critical - It is critical to come as close as possible to the requested time (e.g. for a through antimicrobial level). |
| UD | Use as directed - Drug is to be used as directed by the prescriber. | Use as directed - Drug is to be used as directed by the prescriber. |
| UR | Urgent - Calls for prompt action | Urgent - Calls for prompt action |