ICD-10-CM > V00-Y99 > Y35-Y38 > Y37 > Y37.A > Y37.A1 Y37.A1 Low level blast overpressure in military operations Non-Billable/Non-Specific Applicable To LLB overpressure in military operationsLow level blast overpressure due to explosion in military operations Codes Y37.A1XA..., initial encounterY37.A1XD..., subsequent encounterY37.A1XS..., sequela