R26 vs R27.0
R26 (Abnormalities of gait and mobility) compared with R27.0 (Ataxia, unspecified), 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. R26 carries an Excludes1 note covering R27.0: “ataxia NOS (R27.0)”
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
| R26Abnormalities of gait and mobility | R27.0Ataxia, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Abnormalities of gait and mobility is a non-billable ICD-10-CM category code (R26). | Ataxia, unspecified is a billable ICD-10-CM diagnosis code (R27.0). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources