ICD-10-CM External Cause Index · FY 2026 16 Entries
Malfunction in the External Cause Index ICD-10-CM
The main term Malfunction (mechanism or component) (of) carries 16 external cause index entries pointing to 11 ICD-10-CM codes. Every indented line below refines the event by vehicle, object, place, or intent. External cause codes are reported after the injury code; verify the 7th character on the code page.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
16
Index Entries
11
Codes Referenced
—
Default Code
M
Letter
16 of 16 shown
ICD-10-CM
Index Entries Under Malfunction 16 entries · 11 codes
Malfunction (mechanism or component) (of)
firearm W34.10 Non-billable
airgun W34.110 Non-billable
BB gun W34.110 Non-billable
gas, air or spring-operated gun NEC W34.118 Non-billable
handgun W32.1 Non-billable
hunting rifle W33.12 Non-billable
larger firearm W33.10 Non-billable
specified NEC W33.19 Non-billable
machine gun W33.13 Non-billable
paintball gun W34.111 Non-billable
pellet gun W34.110 Non-billable
shotgun W33.11 Non-billable
specified NEC W34.19 Non-billable
Very pistol [flare] W34.19 Non-billable
handgun see Malfunction, firearm, handgun
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM External Cause of Injuries Index release files, effective October 1, 2025 through September 30, 2026.
