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