G40.82 (Epileptic spasms) 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.
Not coded here — these two are mutually exclusive.
“convulsions NOS (R56.9)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
Not coded here — these two are mutually exclusive.
“seizure (convulsive) NOS (R56.9)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
Not coded here — these two are mutually exclusive.
“epileptic convulsions and seizures (G40.-)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
No — do not report together. G40.82 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. G40.82 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 G40.82: “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).
| G40.82Epileptic spasms | 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 | Epileptic spasms is a non-billable ICD-10-CM category code (G40.82). | Unspecified convulsions is a billable ICD-10-CM diagnosis code (R56.9). |
| Includes | Infantile spasms Salaam attacks West's syndrome | 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