W18.01 vs W21
W18.01 (Striking against sports equipment with subsequent fall) compared with W21 (Striking against or struck by sports equipment), 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. W21 carries an Excludes1 note covering W18.01: “striking against or struck by sports equipment with subsequent fall (W18.01)”
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
| W18.01Striking against sports equipment with subsequent fall | W21Striking against or struck by sports equipment | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header Report instead: W21.00XA, W21.00XD, W21.00XS, W21.01XA, W21.01XD |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Striking against sports equipment with subsequent fall is a non-billable ICD-10-CM category code (W18.01). | Striking against or struck by sports equipment is a non-billable ICD-10-CM category code (W21). |
| 7th character | The appropriate 7th character is to be added to each code from category W18 | The appropriate 7th character is to be added to each code from category W21 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources