W18.31XA vs Y01
W18.31XA (Fall on same level due to stepping on an object, initial encounter) compared with Y01 (Assault by pushing from high place), 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. W18.31XA carries an Excludes1 note covering Y01: “assault involving a fall (Y01-Y02)”
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
| W18.31XAFall on same level due to stepping on an object, initial encounter | Y01Assault by pushing from high place | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | V00-Y99 — External Causes of Morbidity (V00-Y99) | V00-Y99 — External Causes of Morbidity (V00-Y99) |
| Definition | Fall on same level due to stepping on an object, initial encounter is a billable ICD-10-CM diagnosis code (W18.31A). | Assault by pushing from high place is a non-billable ICD-10-CM category code (Y01). |
| 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 Y01 |
| Includes | Fall on same level due to stepping on an animal | homicide injuries inflicted by another person with intent to injure or kill, by any means |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources