ICD-10-CM > V00-Y99 > Y35-Y38 > Y36 > Y36.4 > Y36.46 > Y36.461 Y36.461 War operations involving intentional restriction of air and airway, civilian Non-Billable/Non-Specific Codes Y36.461A..., initial encounterY36.461D..., subsequent encounterY36.461S..., sequela