W33.1 — Accidental rifle, shotgun and larger firearm malfunction
Is W33.1 billable?
No — W33.1 is a non-billable header code. W33.1 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 15 billable codes beneath W33.1.
Billable codes under this header
- W33.10XAAccidental malfunction of unspecified larger firearm, initial encounter
- W33.10XDAccidental malfunction of unspecified larger firearm, subsequent encounter
- W33.10XSAccidental malfunction of unspecified larger firearm, sequela
- W33.11XAAccidental malfunction of shotgun, initial encounter
- W33.11XDAccidental malfunction of shotgun, subsequent encounter
- W33.11XSAccidental malfunction of shotgun, sequela
- W33.12XAAccidental malfunction of hunting rifle, initial encounter
- W33.12XDAccidental malfunction of hunting rifle, subsequent encounter
- W33.12XSAccidental malfunction of hunting rifle, sequela
- W33.13XAAccidental malfunction of machine gun, initial encounter
- W33.13XDAccidental malfunction of machine gun, subsequent encounter
- W33.13XSAccidental malfunction of machine gun, sequela
- W33.19XAAccidental malfunction of other larger firearm, initial encounter
- W33.19XDAccidental malfunction of other larger firearm, subsequent encounter
- W33.19XSAccidental malfunction of other larger firearm, sequela
W33.1 at a glance
| Code | W33.1 |
|---|---|
| Description | Accidental rifle, shotgun and larger firearm malfunction |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Inclusion terms
Alternative wording in documentation that is classified to W33.1.
- Injury due to explosion of rifle, shotgun and larger firearm (parts)
- Injury due to malfunction of mechanism or component of rifle, shotgun and larger firearm
- Injury due to piercing, cutting, crushing or pinching due to (by) slide trigger mechanism, scope or other gun part
- Injury due to recoil of rifle, shotgun and larger firearm
- Powder burn from rifle, shotgun and larger firearm
Excludes1 — never code together — inherited from W20-W49
The conditions below can never be reported together with W33.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes1 — never code together — inherited from W33
The conditions below can never be reported together with W33.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- accidental airgun discharge and malfunction (W34.010, W34.110)
- accidental BB gun discharge and malfunction (W34.010, W34.110)
- accidental handgun discharge and malfunction (W32.-)
- accidental pellet gun discharge and malfunction (W34.010, W34.110)
- assault by rifle, shotgun and larger firearm discharge (X94)
- firearm discharge involving legal intervention (Y35.0-)
- firearm discharge involving military or war operations (Y36.4-)
- intentional self-harm by rifle, shotgun and larger firearm discharge (X73)
What codes fall under W33.1? (5)
How long has W33.1 existed?
W33.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.