ICD-10-CM > V00-Y99 > Y35-Y38 > Y37 > Y37.4 > Y37.46 Y37.46 Military operations involving intentional restriction of air and airway Non-Billable/Non-Specific Codes Y37.460Military operations involving intentional restriction of air and airway, military personnelY37.460A..., initial encounterY37.460D..., subsequent encounterY37.460S..., sequelaY37.461Military operations involving intentional restriction of air and airway, civilianY37.461A..., initial encounterY37.461D..., subsequent encounterY37.461S..., sequela