W32

ICD-10Non-billable category

Accidental handgun discharge and malfunction

Official ICD-10-CM descriptor (FY2026)

Accidental handgun discharge and malfunction

W32 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Includes

accidental discharge and malfunction of gun for single hand use
accidental discharge and malfunction of pistol
accidental discharge and malfunction of revolver
Handgun discharge and malfunction NOS

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

accidental airgun discharge and malfunction (W34.010, W34.110)
accidental BB gun discharge and malfunction (W34.010, W34.110)
accidental pellet gun discharge and malfunction (W34.010, W34.110)
accidental shotgun discharge and malfunction (W33.01, W33.11)
assault by handgun discharge (X93)
handgun discharge involving legal intervention (Y35.0-)
handgun discharge involving military or war operations (Y36.4-)
intentional self-harm by handgun discharge (X72)
Very pistol discharge and malfunction (W34.09, W34.19)

7th character

The appropriate 7th character is to be added to each code from category W32

Permitted 7th characters

A	initial encounter
D	subsequent encounter
S	sequela

More specific codes under W32

Where this code sits

Chapter: 20. External causes of morbidity (V00-Y99)
Block: Exposure to inanimate mechanical forces (W20-W49)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.