Accidental discharge and malfunction from other and unspecified firearms and guns (W34) ICD-10-CM
The W34 code range covers accidental discharge and malfunction from other and unspecified firearms and guns with 45 ICD-10-CM diagnosis codes. 30 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
- The appropriate 7th character is to be added to each code from category W34
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
Codes in the W34 Range 45 codes · 30 billable
- W34 Accidental discharge and malfunction from other and unspecified firearms and gunsNon-billable
- W34.0 Accidental discharge from other and unspecified firearms and gunsNon-billable
- W34.00 Accidental discharge from unspecified firearms or gunNon-billable
- W34.00XA Accidental discharge from unspecified firearms or gun, initial encounter
- W34.00XD Accidental discharge from unspecified firearms or gun, subsequent encounter
- W34.00XS Accidental discharge from unspecified firearms or gun, sequela
- W34.01 Accidental discharge of gas, air or spring-operated gunsNon-billable
- W34.010 Accidental discharge of airgunNon-billable
- W34.010A Accidental discharge of airgun, initial encounter
- W34.010D Accidental discharge of airgun, subsequent encounter
- W34.010S Accidental discharge of airgun, sequela
- W34.011 Accidental discharge of paintball gunNon-billable
- W34.011A Accidental discharge of paintball gun, initial encounter
- W34.011D Accidental discharge of paintball gun, subsequent encounter
- W34.011S Accidental discharge of paintball gun, sequela
- W34.018 Accidental discharge of other gas, air or spring-operated gunNon-billable
- W34.018A Accidental discharge of other gas, air or spring-operated gun, initial encounter
- W34.018D Accidental discharge of other gas, air or spring-operated gun, subsequent encounter
- W34.018S Accidental discharge of other gas, air or spring-operated gun, sequela
- W34.09 Accidental discharge from other specified firearmsNon-billable
- W34.09XA Accidental discharge from other specified firearms, initial encounter
- W34.09XD Accidental discharge from other specified firearms, subsequent encounter
- W34.09XS Accidental discharge from other specified firearms, sequela
- W34.1 Accidental malfunction from other and unspecified firearms and gunsNon-billable
- W34.10 Accidental malfunction from unspecified firearms or gunNon-billable
- W34.10XA Accidental malfunction from unspecified firearms or gun, initial encounter
- W34.10XD Accidental malfunction from unspecified firearms or gun, subsequent encounter
- W34.10XS Accidental malfunction from unspecified firearms or gun, sequela
- W34.11 Accidental malfunction of gas, air or spring-operated gunsNon-billable
- W34.110 Accidental malfunction of airgunNon-billable
- W34.110A Accidental malfunction of airgun, initial encounter
- W34.110D Accidental malfunction of airgun, subsequent encounter
- W34.110S Accidental malfunction of airgun, sequela
- W34.111 Accidental malfunction of paintball gunNon-billable
- W34.111A Accidental malfunction of paintball gun, initial encounter
- W34.111D Accidental malfunction of paintball gun, subsequent encounter
- W34.111S Accidental malfunction of paintball gun, sequela
- W34.118 Accidental malfunction of other gas, air or spring-operated gunNon-billable
- W34.118A Accidental malfunction of other gas, air or spring-operated gun, initial encounter
- W34.118D Accidental malfunction of other gas, air or spring-operated gun, subsequent encounter
- W34.118S Accidental malfunction of other gas, air or spring-operated gun, sequela
- W34.19 Accidental malfunction from other specified firearmsNon-billable
- W34.19XA Accidental malfunction from other specified firearms, initial encounter
- W34.19XD Accidental malfunction from other specified firearms, subsequent encounter
- W34.19XS Accidental malfunction from other specified firearms, sequela
About the W34 Code Range
The ICD-10 code W34 covers accidental discharges and malfunctions involving other and unspecified firearms and guns. These codes are used to classify injuries resulting from unintended firing or equipment failures of various firearms, including airguns, paintball guns, and other gas- or spring-operated guns.
This section distinguishes between different causes such as accidental discharge (W34.0 series) and accidental malfunctions (W34.1 series) of firearms. Subcategories further specify the type of firearm involved, including unspecified firearms (W34.00), airguns (W34.010), paintball guns (W34.011), and other spring-operated guns (W34.018). The codes also account for the clinical encounter stage with extensions like initial encounter (e.g., W34.00XA), subsequent encounter, and sequela. Medical coders often refer to synonyms such as gunshot wounds or pellet wounds when assigning these codes to correctly capture accidental injuries caused by firearm discharges or malfunctions.
Questions About This Page
How many billable codes are in the W34 range?
Of the 45 codes in this range, 30 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the W34 range classify?
The range classifies accidental discharge and malfunction from other and unspecified firearms and guns. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
