ICD-10-CM > V00-Y99 > W20-W49 > W33 > W33.1 > W33.13 W33.13 Accidental malfunction of machine gun Non-Billable/Non-Specific Applicable To Malfunction of machine gun NOS Codes W33.13XA..., initial encounterW33.13XD..., subsequent encounterW33.13XS..., sequela