| Code | Display | Definition | V2 Concept Comment | V2 Concept Comment As Published |
| S | Stat | Stat | With highest priority | With highest priority |
| A | ASAP | ASAP | Fill after S orders | Fill after S orders |
| R | Routine | Routine | Default | Default |
| P | Preop | Preop | | |
| C | Callback | Callback | | |
| T | Timing critical | Timing critical | A request implying that it is critical to come as close as possible to the requested time, e.g., for a trough anti-microbial level. | A request implying that it is critical to come as close as possible to the requested time, e.g., for a trough anti-microbial level. |
| TS<integer> | Timing critical within <integer> seconds. | Timing critical within <integer> seconds. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> seconds. |
| TM<integer> | Timing critical within <integer> minutes. | Timing critical within <integer> minutes. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> minutes. |
| TH<integer> | Timing critical within <integer> hours. | Timing critical within <integer> hours. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> hours. |
| TD<integer> | Timing critical within <integer> days. | Timing critical within <integer> days. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> days. |
| TW<integer> | Timing critical within <integer> weeks. | Timing critical within <integer> weeks. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> weeks. |
| TL<integer> | Timing critical within <integer> months. | Timing critical within <integer> months. | This is not a real code, but guidelines how to construct the codes. | Timing critical within <integer> months. |
| PRN | As needed | As needed | | |