W33.00XA
✓ BillableAccidental discharge of unspecified larger firearm, initial encounter
External causes of morbidity (V00-Y99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • 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)
Clinical Description
ICD-10-CM code W33.00XA represents accidental discharge of unspecified larger firearm, initial encounter. This code falls under the External causes of morbidity (V00-Y99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 8-character code at the 7th level of specificity. This is the most specific code available in this subcategory. Coders should note that W33.00XA has 8 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code W33.00XA?
ICD-10-CM code W33.00XA is "Accidental discharge of unspecified larger firearm, initial encounter". It belongs to the category: External causes of morbidity (V00-Y99).
Is W33.00XA a billable ICD-10 code?
Yes, W33.00XA is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with W33.00XA?
W33.00XA has 8 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Related Codes in W33.00
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)