2026 ICD-10-CM Diagnosis Code W34Accidental discharge and malfunction from other and unspecified firearms and guns

ICD-10-CM Codes›V01–Y99›W20-W49›W34

ICD-10-CM W34
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

W34 is a non-billable ICD-10-CM category code for accidental discharge and malfunction from other and unspecified firearms and guns, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W34.00XA, W34.00XD, W34.00XS, and W34.010A.

Code Identity

ICD-10-CM Code
W34
Billable Status
No — Non-Billable Category
Code Describes
Accidental discharge and malfunction from other and unspecified firearms and guns
Chapter
W20-W49
Exposure to inanimate mechanical forces

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionW20-W49Exposure to inanimate mechanical forces
CategoryW34Accidental discharge and malfunction from other and unspecified firearms and guns
This CodeW34Accidental discharge and malfunction from other and unspecified firearms and guns

Specific Coding for Acc disch and malfunct from oth and unsp firearms and gunsOverview

Non-specific codes like W34 require more characters. Use one of these billable codes instead:

  • W34.0 for Accidental discharge from other and unspecified firearms and guns

  • W34.00 for Accidental discharge from unspecified firearms or gun

  • W34.01 for Accidental discharge of gas, air or spring-operated guns

  • W34.09 for Accidental discharge from other specified firearms

  • W34.1 for Accidental malfunction from other and unspecified firearms and guns

  • W34.10 for Accidental malfunction from unspecified firearms or gun

  • W34.11 for Accidental malfunction of gas, air or spring-operated guns

  • W34.19 for Accidental malfunction from other specified firearms

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

7th Character Note

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

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient EducationClinical

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About W34Overview

Is W34 a billable code?

No. This is a category header that groups the codes for accidental discharge and malfunction from other and unspecified firearms and guns, and headers cannot be submitted on claims. Claims for accidental discharge and malfunction from other and unspecified firearms and guns need a more specific code from this category, such as W34.00XA, W34.00XD, and W34.00XS.