G40.834 vs R56.9
G40.834 (Dravet syndrome, intractable, without status epilepticus) 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. G40.834 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. G40.834 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 G40.834: “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
| G40.834Dravet syndrome, intractable, without status epilepticus | R56.9Unspecified convulsions | |
|---|---|---|
| Billing status | Billable | 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 | Dravet syndrome, intractable, without status epilepticus is a billable ICD-10-CM diagnosis code (G40.834). | Unspecified convulsions is a billable ICD-10-CM diagnosis code (R56.9). |
| Includes | Dravet syndrome NOS | 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