ICD-10-CM > V00-Y99 > Y35-Y38 > Y36 > Y36.8 > Y36.89 Y36.89 Unspecified war operations occurring after cessation of hostilities Non-Billable/Non-Specific Codes Y36.890Unspecified war operations occurring after cessation of hostilities, military personnelY36.890A..., initial encounterY36.890D..., subsequent encounterY36.890S..., sequelaY36.891Unspecified war operations occurring after cessation of hostilities, civilianY36.891A..., initial encounterY36.891D..., subsequent encounterY36.891S..., sequela