W16 vs W28
W16 (Fall, jump or diving into water) compared with W28 (Contact with powered lawn mower), 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. W16 carries an Excludes1 note covering W28: “fall (in) (from) machinery (in operation) (W28-W31)”
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
| W16Fall, jump or diving into water | W28Contact with powered lawn mower | |
|---|---|---|
| Billing status | Non-billable header Report instead: W16.011A, W16.011D, W16.011S, W16.012A, W16.012D | Non-billable header |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Fall, jump or diving into water is a non-billable ICD-10-CM category code (W16). | Contact with powered lawn mower is a non-billable ICD-10-CM category code (W28). |
| 7th character | The appropriate 7th character is to be added to each code from category W16 | The appropriate 7th character is to be added to code W28 |
| Includes | — | Powered lawn mower (commercial) (residential) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources