ICD-10 Code G40.209 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.209 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
What it is
This code identifies a focal, symptomatic epilepsy disorder with complex partial seizures. It applies when the seizures are not intractable and there is no status epilepticus.
Clinical signs
Typical documentation may describe focal impaired awareness seizures, altered consciousness, automatisms, or postictal confusion. Clinical features vary; refer to documentation.
When to use this code
Use G40.209 when the record clearly states focal or localization-related epilepsy with complex partial seizures and does not describe intractability. You should also confirm the provider documents no status epilepticus. If the note only says “seizure” or “epilepsy” without seizure type, check documentation.
Do not use for
Do not use this code for generalized epilepsy, intractable epilepsy, or episodes documented as status epilepticus. If the seizure type is unspecified, choose a more accurate code only after checking documentation.
Coding tip
Verify both seizure type and qualifiers—nonintractable and without status epilepticus—before assigning G40.209.