ICD-10-CM 2027 diagnosis code
W33.0Accidental rifle, shotgun and larger firearm discharge
W33.0 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it and add the required 7th character.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About W33.0
W33.0 is the ICD-10-CM diagnosis code for accidental rifle, shotgun and larger firearm discharge. It belongs to category W33 (accidental rifle, shotgun and larger firearm discharge and malfunction), block W20-W49 (exposure to inanimate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.
Within W33 (accidental rifle, shotgun and larger firearm discharge and malfunction), W33.0 is specifically for accidental rifle, shotgun and larger firearm discharge. Related codes cover malfunction (W33.1).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category W33
- W33.00Accidental discharge of unspecified larger firearm
- W33.01Accidental discharge of shotgun
- W33.02Accidental discharge of hunting rifle
- W33.03Accidental discharge of machine gun
- W33.09Accidental discharge of other larger firearm
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Notes that apply from higher levels
Instructions written at a parent level also apply to W33.0.
› From W33 Accidental rifle, shotgun and larger firearm discharge and malfunction
- rifle, shotgun and larger firearm discharge and malfunction NOS
- 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)
Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about W33.0
Is W33.0 billable?
- No. W33.0 is a header code. Report one of its more specific subcodes instead.