ICD-10-CM > V00-Y99 > Y35-Y38 > Y36 > Y36.9 > Y36.91 Y36.91 War operations involving unspecified weapon of mass destruction [WMD] Non-Billable/Non-Specific Codes Y36.91XA..., initial encounterY36.91XD..., subsequent encounterY36.91XS..., sequela