ICD-10-CM > V00-Y99 > Y35-Y38 > Y37 > Y37.A Y37.A Blast overpressure in military operations Non-Billable/Non-Specific Code Also type of explosive, if knownaccidental detonation of onboard munitions (Y37.140)explosion of grenade (Y37.290)explosion of torpedo (Y37.040)improvised explosive device (Y37.230) Codes Y37.A1Low level blast overpressure in military operationsY37.A1XA..., initial encounterY37.A1XD..., subsequent encounterY37.A1XS..., sequelaY37.A2High level blast overpressure in military operationsY37.A2XA..., initial encounterY37.A2XD..., subsequent encounterY37.A2XS..., sequela