W33: Accidental rifle, shotgun and larger firearm discharge and malfunction

Codes under W33 (Accidental rifle, shotgun and larger firearm discharge and malfunction). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
W33.0	Accidental rifle, shotgun and larger firearm discharge	—
W33.00	Accidental discharge of unspecified larger firearm	—
W33.00XA	Accidental discharge of unspecified larger firearm, initial encounter	✓
W33.00XD	Accidental discharge of unspecified larger firearm, subsequent encounter	✓
W33.00XS	Accidental discharge of unspecified larger firearm, sequela	✓
W33.01	Accidental discharge of shotgun	—
W33.1	Accidental rifle, shotgun and larger firearm malfunction	—
W33.01XA	Accidental discharge of shotgun, initial encounter	✓
W33.01XD	Accidental discharge of shotgun, subsequent encounter	✓
W33.01XS	Accidental discharge of shotgun, sequela	✓
W33.02	Accidental discharge of hunting rifle	—
W33.02XA	Accidental discharge of hunting rifle, initial encounter	✓
W33.02XD	Accidental discharge of hunting rifle, subsequent encounter	✓
W33.02XS	Accidental discharge of hunting rifle, sequela	✓
W33.03	Accidental discharge of machine gun	—
W33.03XA	Accidental discharge of machine gun, initial encounter	✓
W33.03XD	Accidental discharge of machine gun, subsequent encounter	✓
W33.03XS	Accidental discharge of machine gun, sequela	✓
W33.09	Accidental discharge of other larger firearm	—
W33.09XA	Accidental discharge of other larger firearm, initial encounter	✓
W33.09XD	Accidental discharge of other larger firearm, subsequent encounter	✓
W33.09XS	Accidental discharge of other larger firearm, sequela	✓
W33.10	Accidental malfunction of unspecified larger firearm	—
W33.10XA	Accidental malfunction of unspecified larger firearm, initial encounter	✓
W33.10XD	Accidental malfunction of unspecified larger firearm, subsequent encounter	✓
W33.10XS	Accidental malfunction of unspecified larger firearm, sequela	✓
W33.11	Accidental malfunction of shotgun	—
W33.11XA	Accidental malfunction of shotgun, initial encounter	✓
W33.11XD	Accidental malfunction of shotgun, subsequent encounter	✓
W33.11XS	Accidental malfunction of shotgun, sequela	✓
W33.12	Accidental malfunction of hunting rifle	—
W33.12XA	Accidental malfunction of hunting rifle, initial encounter	✓
W33.12XD	Accidental malfunction of hunting rifle, subsequent encounter	✓
W33.12XS	Accidental malfunction of hunting rifle, sequela	✓
W33.13	Accidental malfunction of machine gun	—
W33.13XA	Accidental malfunction of machine gun, initial encounter	✓
W33.13XD	Accidental malfunction of machine gun, subsequent encounter	✓
W33.13XS	Accidental malfunction of machine gun, sequela	✓
W33.19	Accidental malfunction of other larger firearm	—
W33.19XA	Accidental malfunction of other larger firearm, initial encounter	✓
W33.19XD	Accidental malfunction of other larger firearm, subsequent encounter	✓
W33.19XS	Accidental malfunction of other larger firearm, sequela	✓

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right