Non-Billable / Non-Specific Code
ICD-10-CM W33 is the diagnosis code for Accidental rifle, shotgun and larger firearm discharge and malfunction. This code falls under the section "Exposure to inanimate mechanical forces" within Chapter 20 — External causes of morbidity (V00-Y99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as W33. They are mutually exclusive:
Understanding where W33 sits in the ICD-10-CM classification helps ensure proper coding:
No, W33 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
W33 is the ICD-10-CM diagnosis code for "Accidental rifle, shotgun and larger firearm discharge and malfunction". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
W33 is located in Section W20-W49 — "Exposure to inanimate mechanical forces" within Chapter 20 of the ICD-10-CM Tabular List.
W33 has 2 sub-code(s) that provide more specific detail: W33.0, W33.1.
Use W33 when the patients documented diagnosis matches "Accidental rifle, shotgun and larger firearm discharge and malfunction" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Accidental rifle, shotgun and larger firearm discharge and malfunction is W33.
No, W33 is non-billable. Use a more specific sub-code for primary diagnosis billing.
W33 is in Chapter 20 of the ICD-10-CM Tabular List.
Type 1 Excludes for W33 include: 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.-) and more.
Yes, W33 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.