ICD-10-CM > V00-Y99 > Y35-Y38 > Y36 > Y36.6 > Y36.6X > Y36.6X1 Y36.6X1 War operations involving biological weapons, civilian Non-Billable/Non-Specific Codes Y36.6X1A..., initial encounterY36.6X1D..., subsequent encounterY36.6X1S..., sequela