ICD-10 Code G40.911 – Epilepsy, unspecified, intractable, with status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.911 – Epilepsy, unspecified, intractable, with status epilepticus
What it is
This code identifies epilepsy when the seizure disorder type is not further specified, it is documented as intractable, and the patient is in status epilepticus. Use it when the record supports persistent seizures despite treatment.
Clinical signs
Clinical features vary; refer to documentation. Status epilepticus generally means ongoing seizure activity or repeated seizures without full recovery between episodes, and the epilepsy is noted as difficult to control.
When to use this code
Use G40.911 when the provider documents unspecified epilepsy, intractable disease, and status epilepticus in the same encounter. It is appropriate for inpatient, emergency, or specialist notes that clearly link the seizure disorder to status epilepticus. Check documentation if the type of epilepsy or control status is unclear.
Do not use for
Do not use this code if status epilepticus is not documented, or if the epilepsy is described as controlled or not intractable. Do not assign it when a more specific epilepsy type is recorded.
Coding tip
Confirm all three elements—unspecified epilepsy, intractable, and status epilepticus—before coding; otherwise, choose the most specific documented epilepsy code.