| Y37.120 | Military operations involving destruction of aircraft due to collision with other aircraft, military personnel | NON-BILLABLE CODE |
| Y37.120A | Military operations involving destruction of aircraft due to collision with other aircraft, military personnel, initial encounter | BILLABLE CODE |
| Y37.120D | Military operations involving destruction of aircraft due to collision with other aircraft, military personnel, subsequent encounter | BILLABLE CODE |
| Y37.120S | Military operations involving destruction of aircraft due to collision with other aircraft, military personnel, sequela | BILLABLE CODE |
| Y37.121 | Military operations involving destruction of aircraft due to collision with other aircraft, civilian | NON-BILLABLE CODE |
| Y37.121A | Military operations involving destruction of aircraft due to collision with other aircraft, civilian, initial encounter | BILLABLE CODE |
| Y37.121D | Military operations involving destruction of aircraft due to collision with other aircraft, civilian, subsequent encounter | BILLABLE CODE |
| Y37.121S | Military operations involving destruction of aircraft due to collision with other aircraft, civilian, sequela | BILLABLE CODE |
