W33 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Accidental rifle, shotgun and larger firearm discharge and malfunction.
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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)
The appropriate 7th character is to be added to each code from category W33
A: initial encounter
D: subsequent encounter
S: sequela
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