G40.80 vs R56.9
G40.80 (Other epilepsy) compared with R56.9 (Unspecified convulsions), 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. G40.80 carries an Excludes1 note covering R56.9: “convulsions NOS (R56.9)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. G40.80 carries an Excludes1 note covering R56.9: “seizure (convulsive) NOS (R56.9)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. R56.9 carries an Excludes1 note covering G40.80: “epileptic convulsions and seizures (G40.-)”
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
| G40.80Other epilepsy | R56.9Unspecified convulsions | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Other epilepsy is a non-billable ICD-10-CM category code (G40.80). | Unspecified convulsions is a billable ICD-10-CM diagnosis code (R56.9). |
| Includes | — | Convulsion disorder Fit NOS Recurrent convulsions Seizure(s) (convulsive) NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources