ICD-10 Code G40.89 – Other seizures (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.89 – Other seizures
What it is
G40.89 identifies seizure disorders that do not fit a more specific epilepsy or seizure code. Use it when the documentation states “other seizures” or gives a seizure type not captured elsewhere.
Clinical signs
Clinical features vary; refer to documentation. Seizures may include transient altered awareness, involuntary movements, or postictal confusion, but the record should support the specific seizure description.
When to use this code
Use this code when the provider documents other seizures and no more specific ICD-10-CM seizure code applies. It is appropriate for clearly described seizure events that remain unclassified in the note. Check documentation if the record also suggests epilepsy type, status epilepticus, or another defined seizure disorder.
Do not use for
Do not use it when the documentation supports a more specific seizure or epilepsy code. Do not use it for syncope, tremor, or other non-seizure events unless the provider confirms a seizure diagnosis.
Coding tip
Code the most specific seizure term documented, and query the provider if “other seizures” is vague or could map to a more specific category.