ICD-10-CM > V00-Y99 > Y35-Y38 > Y37 > Y37.A > Y37.A2 Y37.A2 High level blast overpressure in military operations Non-Billable/Non-Specific Applicable To High level blast overpressure due to explosion in military operationsHLB overpressure in military operations Codes Y37.A2XA..., initial encounterY37.A2XD..., subsequent encounterY37.A2XS..., sequela