W38 vs Y09
W38 (Explosion and rupture of other specified pressurized devices) compared with Y09 (Assault by unspecified means), 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. W38 carries an Excludes1 note covering Y09: “assault (X92-Y09)”
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
| W38Explosion and rupture of other specified pressurized devices | Y09Assault by unspecified means | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Explosion and rupture of other specified pressurized devices is a non-billable ICD-10-CM category code (W38). | Assault by unspecified means is a billable ICD-10-CM diagnosis code (Y09). |
| 7th character | The appropriate 7th character is to be added to code W38 | — |
| Includes | — | homicide injuries inflicted by another person with intent to injure or kill, by any means Assassination (attempted) NOS Homicide (attempted) NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources