W33

ICD-10Non-billable category

Acc rifle, shotgun and larger firearm discharge and malfunct

Official ICD-10-CM descriptor (FY2026)

Accidental rifle, shotgun and larger firearm discharge and malfunction

W33 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

  • rifle, shotgun and larger firearm 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 handgun discharge and malfunction (W32.-)
  • accidental pellet gun discharge and malfunction (W34.010, W34.110)
  • assault by rifle, shotgun and larger firearm discharge (X94)
  • firearm discharge involving legal intervention (Y35.0-)
  • firearm discharge involving military or war operations (Y36.4-)
  • intentional self-harm by rifle, shotgun and larger firearm discharge (X73)

7th character

  • The appropriate 7th character is to be added to each code from category W33

Permitted 7th characters

Ainitial encounter
Dsubsequent encounter
Ssequela

More specific codes under W33

Where this code sits

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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.

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