ICD-10-CM > V00-Y99 > W20-W49 > W34 > W34.1 > W34.10 W34.10 Accidental malfunction from unspecified firearms or gun Non-Billable/Non-Specific Applicable To Firearm malfunction NOS Codes W34.10XA..., initial encounterW34.10XD..., subsequent encounterW34.10XS..., sequela