ICD-10-CM > V00-Y99 > Y35-Y38 > Y37 > Y37.9 Y37.9 Other and unspecified military operations Non-Billable/Non-Specific Codes Y37.90Military operations, unspecifiedY37.90XA..., initial encounterY37.90XD..., subsequent encounterY37.90XS..., sequelaY37.91Military operations involving unspecified weapon of mass destruction [WMD]Y37.91XA..., initial encounterY37.91XD..., subsequent encounterY37.91XS..., sequelaY37.92Military operations involving friendly fireY37.92XA..., initial encounterY37.92XD..., subsequent encounterY37.92XS..., sequela