W40 vs Y35.1
W40 (Explosion of other materials) compared with Y35.1 (Legal intervention involving explosives), 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. W40 carries an Excludes1 note covering Y35.1: “explosion involving legal intervention (Y35.1-)”
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
| W40Explosion of other materials | Y35.1Legal intervention involving explosives | |
|---|---|---|
| Billing status | Non-billable header Report instead: W40.0XXA, W40.0XXD, W40.0XXS, W40.1XXA, W40.1XXD | Non-billable header Report instead: Y35.101A, Y35.101D, Y35.101S, Y35.102A, Y35.102D |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Explosion of other materials is a non-billable ICD-10-CM category code (W40). | Legal intervention involving explosives is a non-billable ICD-10-CM category code (Y35.1). |
| 7th character | The appropriate 7th character is to be added to each code from category W40 | The appropriate 7th character is to be added to each code from category Y35 |
| Includes | — | 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