W33 vs Y35.0
W33 (Accidental rifle, shotgun and larger firearm discharge and malfunction) compared with Y35.0 (Legal intervention involving firearm discharge), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. W33 carries an Excludes1 note covering Y35.0: “firearm discharge involving legal intervention (Y35.0-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| W33Accidental rifle, shotgun and larger firearm discharge and malfunction | Y35.0Legal intervention involving firearm discharge | |
|---|---|---|
| Billing status | Non-billable header Report instead: W33.00XA, W33.00XD, W33.00XS, W33.01XA, W33.01XD | Non-billable header Report instead: Y35.001A, Y35.001D, Y35.001S, Y35.002A, Y35.002D |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Accidental rifle, shotgun and larger firearm discharge and malfunction is a non-billable ICD-10-CM category code (W33). | Legal intervention involving firearm discharge is a non-billable ICD-10-CM category code (Y35.0). |
| 7th character | The appropriate 7th character is to be added to each code from category W33 | The appropriate 7th character is to be added to each code from category Y35 |
| Includes | rifle, shotgun and larger firearm discharge and malfunction NOS | any injury sustained as a result of an encounter with any law enforcement official, serving in any capacity at the time of the encounter, whether on-duty or off-duty. Includes: injury to law enforcement official, suspect and bystander |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources