These codes may be used by police officers and other emergency response personnel to communicate more effectively during emergencies.
| Code | Description |
|---|---|
| Code 10 | Critical trauma case |
| Code 20 | Acute trauma case |
| Code 30 | Trauma case |
| Code 40 | Serious case (IV started) |
| Code 50 | Basic transport (not serious) |
| Code 77 | Possible ambush - use caution |
| Code N | Newsworthy event |