ICD-10 Code G40.909 – Epilepsy, unspecified, not intractable, without status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.909 – Epilepsy, unspecified, not intractable, without status epilepticus
What it is
This code identifies epilepsy when the type is not specified, the seizures are not described as intractable, and there is no status epilepticus. Use it when documentation confirms epilepsy but does not provide a more precise subtype.
Clinical signs
Typical findings include recurrent unprovoked seizures, but the seizure pattern may be unclear in the record. Clinical features vary; refer to documentation for the exact seizure type and any associated neurologic history.
When to use this code
Use G40.909 when the provider documents epilepsy without naming a specific syndrome, localization, or seizure type. It is also appropriate when the record states the condition is not intractable and there is no status epilepticus. If the note gives a more specific epilepsy code, use that instead.
Do not use for
Do not use this code for status epilepticus, intractable epilepsy, or epilepsy with a specified subtype when documentation supports a more exact code. Check documentation if the seizure disorder is not clearly identified as epilepsy.
Coding tip
Review the provider’s wording carefully; unspecified epilepsy should be coded only when no more specific epilepsy detail is documented.