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  5. Accidental rifle, shotgun and larger firearm discharge and malfunction (W33)

Accidental rifle, shotgun and larger firearm discharge and malfunction (W33)

The ICD-10 code W33 category is used to classify accidental discharges and malfunctions involving rifles, shotguns, and larger firearms. These codes detail the specific type of firearm and the nature of the incident, whether it's an initial injury, subsequent care, or a long-term complication.

This section covers both accidental firing and mechanical malfunctions of various larger firearms, including unspecified firearms, shotguns, hunting rifles, machine guns, and other large firearms. For example, codes like W33.01XA specify accidental discharge of a shotgun during the initial encounter. This coding is essential for accurately documenting incidents such as shotgun accidents, injuries caused by firearm missiles, or injuries related to hunting rifles and machine guns. The use of terms such as "accidental discharge," "shotgun wound," or "injury due to firearm missile" helps medical coders apply the correct ICD-10 code for firearm-related injuries. Moreover, the codes distinguish encounters by initial, subsequent, or sequela stages, allowing detailed tracking of treatment and recovery phases for injuries caused by accidental large firearm incidents.

  • External causes of morbidity and mortality (V01–Y99)

    • Exposure to inanimate mechanical forces (W20-W49)

        • Accidental rifle, shotgun and larger firearm discharge and malfunction (W33)

        • W33 Accidental rifle, shotgun and larger firearm discharge and malfunction
        • W33.0 Accidental rifle, shotgun and larger firearm discharge
        • W33.00 Accidental discharge of unspecified larger firearm
        • W33.00XA Accidental discharge of unspecified larger firearm, initial encounter
        • W33.00XD Accidental discharge of unspecified larger firearm, subsequent encounter
        • W33.00XS Accidental discharge of unspecified larger firearm, sequela
        • W33.01 Accidental discharge of shotgun
        • W33.01XA Accidental discharge of shotgun, initial encounter
        • W33.01XD Accidental discharge of shotgun, subsequent encounter
        • W33.01XS Accidental discharge of shotgun, sequela
        • W33.02 Accidental discharge of hunting rifle
        • W33.02XA Accidental discharge of hunting rifle, initial encounter
        • W33.02XD Accidental discharge of hunting rifle, subsequent encounter
        • W33.02XS Accidental discharge of hunting rifle, sequela
        • W33.03 Accidental discharge of machine gun
        • W33.03XA Accidental discharge of machine gun, initial encounter
        • W33.03XD Accidental discharge of machine gun, subsequent encounter
        • W33.03XS Accidental discharge of machine gun, sequela
        • W33.09 Accidental discharge of other larger firearm
        • W33.09XA Accidental discharge of other larger firearm, initial encounter
        • W33.09XD Accidental discharge of other larger firearm, subsequent encounter
        • W33.09XS Accidental discharge of other larger firearm, sequela
        • W33.1 Accidental rifle, shotgun and larger firearm malfunction
        • W33.10 Accidental malfunction of unspecified larger firearm
        • W33.10XA Accidental malfunction of unspecified larger firearm, initial encounter
        • W33.10XD Accidental malfunction of unspecified larger firearm, subsequent encounter
        • W33.10XS Accidental malfunction of unspecified larger firearm, sequela
        • W33.11 Accidental malfunction of shotgun
        • W33.11XA Accidental malfunction of shotgun, initial encounter
        • W33.11XD Accidental malfunction of shotgun, subsequent encounter
        • W33.11XS Accidental malfunction of shotgun, sequela
        • W33.12 Accidental malfunction of hunting rifle
        • W33.12XA Accidental malfunction of hunting rifle, initial encounter
        • W33.12XD Accidental malfunction of hunting rifle, subsequent encounter
        • W33.12XS Accidental malfunction of hunting rifle, sequela
        • W33.13 Accidental malfunction of machine gun
        • W33.13XA Accidental malfunction of machine gun, initial encounter
        • W33.13XD Accidental malfunction of machine gun, subsequent encounter
        • W33.13XS Accidental malfunction of machine gun, sequela
        • W33.19 Accidental malfunction of other larger firearm
        • W33.19XA Accidental malfunction of other larger firearm, initial encounter
        • W33.19XD Accidental malfunction of other larger firearm, subsequent encounter
        • W33.19XS Accidental malfunction of other larger firearm, sequela

Instructional Notations

Includes

This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

  • rifle, shotgun and larger firearm discharge and malfunction NOS

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • 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 Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

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

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

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