W34 – Accidental discharge and malfunction from other and unspecified firearms and guns

ICD-10-CM 2027 diagnosis code · Exposure to inanimate mechanical forces

Non-billable header

ICD-10-CM code W34
Code
W34 (claims format: W34)
Description
Accidental discharge and malfunction from other and unspecified firearms and guns
Short description
Acc disch and malfunct from oth and unsp firearms and guns
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
20. External causes of morbidity (V00-Y99)
Block
W20-W49 Exposure to inanimate mechanical forces

Billable codes under W34

W34 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Notes for W34

7th character note:
  • The appropriate 7th character is to be added to each code from category W34

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block W20-W49

Excludes1 (not coded here):
  • assault (X92-Y09)
  • contact or collision with animals or persons (W50-W64)
  • exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
  • intentional self-harm (X71-X83)

Frequently asked questions

What is ICD-10 code W34?

W34 is the ICD-10-CM code for accidental discharge and malfunction from other and unspecified firearms and guns, in the block W20-W49 (Exposure to inanimate mechanical forces).

Is W34 a billable code?

No. W34 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.