ICD-10 Code G40.409 – Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.409 – Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
What it is
This code identifies a generalized epilepsy or epileptic syndrome that does not fit a more specific category. It also indicates the seizures are not intractable and there is no status epilepticus.
Clinical signs
Clinical features vary; refer to documentation. Generalized epileptic syndromes typically involve seizures that affect both sides of the brain from onset, with possible loss of awareness or convulsive activity.
When to use this code
Use this code when the provider documents a generalized epilepsy syndrome that is not otherwise specified more precisely. You should also confirm that the condition is described as not intractable and that status epilepticus is not present.
If the record names a specific generalized epilepsy syndrome, code that more specific diagnosis instead. Check documentation when the seizure type, control status, or syndrome classification is unclear.
Do not use for
Do not use this code for intractable epilepsy, status epilepticus, or focal seizure disorders. If the documentation supports a more specific generalized epilepsy code, select that code instead.
Coding tip
Verify all three elements in the note: generalized epilepsy, not intractable, and no status epilepticus.