W18.43XD vs W51
W18.43XD (Slipping, tripping and stumbling without falling due to stepping from one level to another, subsequent encounter) compared with W51 (Accidental striking against or bumped into by another person), 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. W18.43XD carries an Excludes1 note covering W51: “collision with another person without fall (W51)”
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
| W18.43XDSlipping, tripping and stumbling without falling due to stepping from one level to another, subsequent encounter | W51Accidental striking against or bumped into by another person | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Slipping, tripping and stumbling without falling due to stepping from one level to another, subsequent encounter is a billable ICD-10-CM diagnosis code (W18.43D). | Accidental striking against or bumped into by another person is a non-billable ICD-10-CM category code (W51). |
| 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 code W51 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources