| Y37.6X0 | Military operations involving biological weapons, military personnel | NON-BILLABLE CODE |
| Y37.6X0A | Military operations involving biological weapons, military personnel, initial encounter | BILLABLE CODE |
| Y37.6X0D | Military operations involving biological weapons, military personnel, subsequent encounter | BILLABLE CODE |
| Y37.6X0S | Military operations involving biological weapons, military personnel, sequela | BILLABLE CODE |
| Y37.6X1 | Military operations involving biological weapons, civilian | NON-BILLABLE CODE |
| Y37.6X1A | Military operations involving biological weapons, civilian, initial encounter | BILLABLE CODE |
| Y37.6X1D | Military operations involving biological weapons, civilian, subsequent encounter | BILLABLE CODE |
| Y37.6X1S | Military operations involving biological weapons, civilian, sequela | BILLABLE CODE |
