W33.11 – Accidental malfunction of shotgun

ICD-10-CM 2027 diagnosis code · Exposure to inanimate mechanical forces

Non-billable header

ICD-10-CM code W33.11

Code: W33.11 (claims format: W3311)
Description: Accidental malfunction of shotgun
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: W20-W49 Exposure to inanimate mechanical forces
Parent codes: W33 › W33.1

Billable codes under W33.11

W33.11 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes for W33.11

Applicable to:

Malfunction of shotgun NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

W33 – Accidental rifle, shotgun and larger firearm discharge and malfunction

Includes:

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)

7th character note:

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

W33.1 – Accidental rifle, shotgun and larger firearm malfunction

Applicable to:

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

Block W20-W49

Excludes1 (not coded here):

assault (X92-Y09)
contact or collision with animals or persons (W50-W64)
exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
intentional self-harm (X71-X83)

Related codes in W33.1

Frequently asked questions

What is ICD-10 code W33.11?

W33.11 is the ICD-10-CM code for accidental malfunction of shotgun, in the block W20-W49 (Exposure to inanimate mechanical forces).

Is W33.11 a billable code?

No. W33.11 is a header code with more specific child codes; report one of the billable codes listed above.

What category does W33.11 belong to?

It belongs to category W33 – Accidental rifle, shotgun and larger firearm discharge and malfunction.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.