ICD-10-CM category
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 | — |
| W33.0 | Accidental rifle, shotgun and larger firearm discharge | — |
| W33.00 | Accidental discharge of unspecified larger firearm | — |
| W33.00 | Accidental discharge of unspecified larger firearm | — |
| W33.00XA | Accidental discharge of unspecified larger firearm, initial encounter | ✓ |
| W33.00XA | Accidental discharge of unspecified larger firearm, initial encounter | ✓ |
| W33.00XD | Accidental discharge of unspecified larger firearm, subsequent encounter | ✓ |
| W33.00XD | Accidental discharge of unspecified larger firearm, subsequent encounter | ✓ |
| W33.00XS | Accidental discharge of unspecified larger firearm, sequela | ✓ |
| W33.00XS | Accidental discharge of unspecified larger firearm, sequela | ✓ |
| W33.01 | Accidental discharge of shotgun | — |
| W33.01 | Accidental discharge of shotgun | — |
| W33.1 | Accidental rifle, shotgun and larger firearm malfunction | — |
| W33.1 | Accidental rifle, shotgun and larger firearm malfunction | — |
| W33.01XA | Accidental discharge of shotgun, initial encounter | ✓ |
| W33.01XA | Accidental discharge of shotgun, initial encounter | ✓ |
| W33.01XD | Accidental discharge of shotgun, subsequent encounter | ✓ |
| W33.01XD | Accidental discharge of shotgun, subsequent encounter | ✓ |
| W33.01XS | Accidental discharge of shotgun, sequela | ✓ |
| W33.01XS | Accidental discharge of shotgun, sequela | ✓ |
| W33.02 | Accidental discharge of hunting rifle | — |
| W33.02 | Accidental discharge of hunting rifle | — |
| W33.02XA | Accidental discharge of hunting rifle, initial encounter | ✓ |
| W33.02XA | Accidental discharge of hunting rifle, initial encounter | ✓ |
| W33.02XD | Accidental discharge of hunting rifle, subsequent encounter | ✓ |
| W33.02XD | Accidental discharge of hunting rifle, subsequent encounter | ✓ |
| W33.02XS | Accidental discharge of hunting rifle, sequela | ✓ |
| W33.02XS | Accidental discharge of hunting rifle, sequela | ✓ |
| W33.03 | Accidental discharge of machine gun | — |
| W33.03 | Accidental discharge of machine gun | — |
| W33.03XA | Accidental discharge of machine gun, initial encounter | ✓ |
| W33.03XA | Accidental discharge of machine gun, initial encounter | ✓ |
| W33.03XD | Accidental discharge of machine gun, subsequent encounter | ✓ |
| W33.03XD | Accidental discharge of machine gun, subsequent encounter | ✓ |
| W33.03XS | Accidental discharge of machine gun, sequela | ✓ |
| W33.03XS | Accidental discharge of machine gun, sequela | ✓ |
| W33.09 | Accidental discharge of other larger firearm | — |
| W33.09 | Accidental discharge of other larger firearm | — |
| W33.09XA | Accidental discharge of other larger firearm, initial encounter | ✓ |
| W33.09XA | Accidental discharge of other larger firearm, initial encounter | ✓ |
| W33.09XD | Accidental discharge of other larger firearm, subsequent encounter | ✓ |
| W33.09XD | Accidental discharge of other larger firearm, subsequent encounter | ✓ |
| W33.09XS | Accidental discharge of other larger firearm, sequela | ✓ |
| W33.09XS | Accidental discharge of other larger firearm, sequela | ✓ |
| W33.10 | Accidental malfunction of unspecified larger firearm | — |
| W33.10 | Accidental malfunction of unspecified larger firearm | — |
| W33.10XA | Accidental malfunction of unspecified larger firearm, initial encounter | ✓ |
| W33.10XA | Accidental malfunction of unspecified larger firearm, initial encounter | ✓ |
| W33.10XD | Accidental malfunction of unspecified larger firearm, subsequent encounter | ✓ |
| W33.10XD | Accidental malfunction of unspecified larger firearm, subsequent encounter | ✓ |
| W33.10XS | Accidental malfunction of unspecified larger firearm, sequela | ✓ |
| W33.10XS | Accidental malfunction of unspecified larger firearm, sequela | ✓ |
| W33.11 | Accidental malfunction of shotgun | — |
| W33.11 | Accidental malfunction of shotgun | — |
| W33.11XA | Accidental malfunction of shotgun, initial encounter | ✓ |
| W33.11XA | Accidental malfunction of shotgun, initial encounter | ✓ |
| W33.11XD | Accidental malfunction of shotgun, subsequent encounter | ✓ |
| W33.11XD | Accidental malfunction of shotgun, subsequent encounter | ✓ |
| W33.11XS | Accidental malfunction of shotgun, sequela | ✓ |
| W33.11XS | Accidental malfunction of shotgun, sequela | ✓ |
| W33.12 | Accidental malfunction of hunting rifle | — |
| W33.12 | Accidental malfunction of hunting rifle | — |
| W33.12XA | Accidental malfunction of hunting rifle, initial encounter | ✓ |
| W33.12XA | Accidental malfunction of hunting rifle, initial encounter | ✓ |
| W33.12XD | Accidental malfunction of hunting rifle, subsequent encounter | ✓ |
| W33.12XD | Accidental malfunction of hunting rifle, subsequent encounter | ✓ |
| W33.12XS | Accidental malfunction of hunting rifle, sequela | ✓ |
| W33.12XS | Accidental malfunction of hunting rifle, sequela | ✓ |
| W33.13 | Accidental malfunction of machine gun | — |
| W33.13 | Accidental malfunction of machine gun | — |
| W33.13XA | Accidental malfunction of machine gun, initial encounter | ✓ |
| W33.13XA | Accidental malfunction of machine gun, initial encounter | ✓ |
| W33.13XD | Accidental malfunction of machine gun, subsequent encounter | ✓ |
| W33.13XD | Accidental malfunction of machine gun, subsequent encounter | ✓ |
| W33.13XS | Accidental malfunction of machine gun, sequela | ✓ |
| W33.13XS | Accidental malfunction of machine gun, sequela | ✓ |
| W33.19 | Accidental malfunction of other larger firearm | — |
| W33.19 | Accidental malfunction of other larger firearm | — |
| W33.19XA | Accidental malfunction of other larger firearm, initial encounter | ✓ |
| W33.19XA | Accidental malfunction of other larger firearm, initial encounter | ✓ |
| W33.19XD | Accidental malfunction of other larger firearm, subsequent encounter | ✓ |
| W33.19XD | Accidental malfunction of other larger firearm, subsequent encounter | ✓ |
| W33.19XS | Accidental malfunction of other larger firearm, sequela | ✓ |
| W33.19XS | Accidental malfunction of other larger firearm, sequela | ✓ |
Frequently asked questions
What is ICD-10-CM code W33?
W33 is an ICD-10-CM category covering Accidental rifle, shotgun and larger firearm discharge and malfunction. It contains 84 more specific diagnosis codes, 60 of which are billable.
Is W33 a billable code?
No — W33 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example W33.0 — Accidental rifle, shotgun and larger firearm discharge). 60 of the 84 codes under W33 are billable.
What codes fall under W33?
W33 includes W33.0, W33.0, W33.00, W33.00, W33.00XA, plus 79 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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