ICD-10-CM W33: Accidental rifle, shotgun and larger firearm discharge and malfunction

ICD-10-CM Diagnosis Code (2025)

Official Description for W33

Accidental rifle, shotgun and larger firearm discharge and malfunction

Coding Notes & Guidelines for W33

Includes Notes

rifle, shotgun and larger firearm discharge and malfunction NOS

Excludes1: Not Coded Here
  • 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)
Inclusion Terms

Discharge of unspecified larger firearm NOS

Inclusion Terms

Discharge of shotgun NOS

Inclusion Terms

Discharge of hunting rifle NOS

Inclusion Terms

Discharge of machine gun NOS

Inclusion Terms

Discharge of other larger firearm NOS

Inclusion Terms
  • Injury due to explosion of rifle, shotgun and larger firearm (parts)
  • Injury due to malfunction of mechanism or component of rifle, shotgun and larger firearm
  • Injury due to piercing, cutting, crushing or pinching due to (by) slide trigger mechanism, scope or other gun part
  • Injury due to recoil of rifle, shotgun and larger firearm
  • Powder burn from rifle, shotgun and larger firearm
Inclusion Terms

Malfunction of unspecified larger firearm NOS

Inclusion Terms

Malfunction of shotgun NOS

Inclusion Terms

Malfunction of hunting rifle NOS

Inclusion Terms

Malfunction of machine gun NOS

Inclusion Terms

Malfunction of other larger firearm NOS

7th Character Guidance

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

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for W33):

W33.0 - Accidental rifle, shotgun and larger firearm discharge W33.00 - Accidental discharge of unspecified larger firearm W33.01 - Accidental discharge of shotgun W33.02 - Accidental discharge of hunting rifle W33.03 - Accidental discharge of machine gun W33.09 - Accidental discharge of other larger firearm W33.1 - Accidental rifle, shotgun and larger firearm malfunction W33.10 - Accidental malfunction of unspecified larger firearm W33.11 - Accidental malfunction of shotgun W33.12 - Accidental malfunction of hunting rifle W33.13 - Accidental malfunction of machine gun W33.19 - Accidental malfunction of other larger firearm

About ICD-10-CM Code W33 (Accidental rifle)

ICD-10-CM code W33 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM W33 became effective on October 1, 2024.

This page provides detailed information about W33 - Accidental rifle, shotgun and larger firearm discharge and malfunction. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Accidental rifle related to shotgun and larger firearm discharge and malfunction.