ICD-10-CM > V00-Y99 > Y35-Y38 > Y36 > Y36.4 > Y36.46 Y36.46 War operations involving intentional restriction of air and airway Non-Billable/Non-Specific Codes Y36.460War operations involving intentional restriction of air and airway, military personnelY36.460A..., initial encounterY36.460D..., subsequent encounterY36.460S..., sequelaY36.461War operations involving intentional restriction of air and airway, civilianY36.461A..., initial encounterY36.461D..., subsequent encounterY36.461S..., sequela