ICD-10 Code G40.80 – Other Epilepsy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.80 – Other epilepsy
What it is
G40.80 identifies epilepsy that does not fit a more specific seizure subtype. Use it when the record confirms epilepsy, but the documentation does not name a more precise category.
Clinical signs
Clinical features vary; refer to documentation. Epilepsy is generally marked by recurrent unprovoked seizures, but the seizure type, frequency, and associated findings must be documented clearly.
When to use this code
Use this code when the provider documents epilepsy and the available details do not support a more specific G40 code. It may also apply when the chart says “other epilepsy” or gives an atypical seizure pattern without further classification. Check documentation if the seizure type, syndrome, or cause is described elsewhere.
Do not use for
Do not use G40.80 if the record supports a more specific epilepsy code, such as a defined seizure syndrome or another named epilepsy type. Do not use it for isolated seizures without a diagnosis of epilepsy.
Coding tip
Query the provider when the note says epilepsy but does not specify the seizure type or syndrome.