ICD-10 Code G40.111 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.111 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus
What it is
This code identifies a focal, symptomatic epilepsy syndrome with simple partial seizures that do not respond to treatment and are currently in status epilepticus. Use it when the seizure disorder is linked to an underlying brain condition and the documentation supports ongoing, continuous seizure activity.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include focal seizure symptoms with preserved awareness, such as localized motor, sensory, or autonomic signs, plus evidence that seizures are prolonged or repeated without recovery, consistent with status epilepticus.
When to use this code
Use this code when the record clearly states focal symptomatic epilepsy with simple partial seizures, is intractable, and includes status epilepticus. You should also use it when the provider links the epilepsy to a known structural or symptomatic cause and documents failure to control seizures with treatment.
If the note only says “seizures” or “epilepsy” without these qualifiers, check documentation before coding. Confirm that status epilepticus is documented separately and that the seizure type and intractability are both specified.
Do not use for
Do not use this code for generalized seizures, absence seizures, or focal epilepsy without status epilepticus. Do not assign it when intractability or the specific simple partial seizure type is not documented.
Coding tip
Match all three elements—focal symptomatic epilepsy, intractable, and status epilepticus—before assigning G40.111.