ICD-10 Code G40.301 – Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.301 – Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus
What it is
This code identifies a generalized idiopathic epilepsy or epileptic syndrome that is not described as intractable and is complicated by status epilepticus. Use it when the record clearly shows a generalized epilepsy syndrome with prolonged or repeated seizures without full recovery between events.
Clinical signs
Common findings include generalized seizure activity and documentation of status epilepticus. Clinical features vary; refer to documentation for the specific epilepsy syndrome, seizure type, and whether the episode is ongoing or resolved.
When to use this code
Use this code when the clinician documents generalized idiopathic epilepsy or a generalized epileptic syndrome and also states status epilepticus. It is appropriate for encounters focused on active seizure management or follow-up after a documented status episode. Confirm that the condition is not documented as intractable.
Do not use for
Do not use this code if the epilepsy is described as intractable, or if status epilepticus is not documented. Check documentation when the seizure disorder is focal, unspecified, or better supported by another epilepsy code.
Coding tip
Verify both the generalized epilepsy diagnosis and the status epilepticus statement before assigning G40.301.