ICD-10-CM > V00-Y99 > W20-W49 > W32 > W32.1 W32.1 Accidental handgun malfunction Non-Billable/Non-Specific Applicable To Injury due to explosion of handgun (parts)Injury due to malfunction of mechanism or component of handgunInjury due to recoil of handgunPowder burn from handgun Codes W32.1XXA..., initial encounterW32.1XXD..., subsequent encounterW32.1XXS..., sequela