G40.82 (Epileptic spasms) compared with P90 (Convulsions of newborn), 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.
“seizure of newborn (P90)”
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 P90: “seizure of newborn (P90)”
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 | P90Convulsions of newborn | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) |
| Definition | Epileptic spasms is a non-billable ICD-10-CM category code (G40.82). | Convulsions of newborn is a billable ICD-10-CM diagnosis code (P90). |
| Includes | Infantile spasms Salaam attacks West's syndrome | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources