ICD-10-CM 2027 diagnosis code

W34Accidental discharge and malfunction from other and unspecified firearms and guns

Not billable — use a more specific code

W34 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.Short description: Acc disch and malfunct from oth and unsp firearms and guns

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 W34

W34 is the ICD-10-CM diagnosis code for accidental discharge and malfunction from other and unspecified firearms and guns. It belongs to 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 2 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: W34.0 (guns) and W34.1 (guns).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under W34

Notes that apply from higher levels

Instructions written at a parent level also apply to W34.

Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.

Codes whose notes reference W34

W20Excludes1

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about W34

Is W34 billable?: No. W34 is a header code. Report one of its more specific subcodes instead.