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