W33.09 — Accidental discharge of other larger firearm
Is W33.09 billable?
No — W33.09 is a non-billable header code. W33.09 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 3 billable codes beneath W33.09.
W33.09 at a glance
| Code | W33.09 |
|---|---|
| Description | Accidental discharge of other larger firearm |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is W33.09 listed in the External Cause Index?
These are the routes through the External Cause of Injuries Index that lead to W33.09 — how the injury happened, rather than what the injury was.
- Discharge › firearm › larger › specified NEC › accidental (accidental)
Inclusion terms
Alternative wording in documentation that is classified to W33.09.
- Discharge of other larger firearm NOS
Excludes1 — never code together — inherited from W20-W49
The conditions below can never be reported together with W33.09 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 W33.09 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 W33.09? (3)
How long has W33.09 existed?
W33.09 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.