G40.909 — Epilepsy, unspecified, not intractable, without status epilepticus

G40.909

ICD-10 Chapter 6: Nervous System — illustrative image — Chapter 6: Diseases of the nervous system (G00–G99) — illustrative image

What this code means

Epilepsy is a tendency to recurrent seizures caused by abnormal electrical activity in the brain.

Also called: epilepsy, seizure disorder.

When this code is used

Used for epilepsy, unspecified, not intractable, without status epilepticus.

Where it sits in ICD-10-CM

Code G40.909 belongs to Chapter 6: Diseases of the nervous system, which covers codes G00–G99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Seizures

Related anatomy

Brain

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Frequently asked questions

What is ICD-10-CM code G40.909?

G40.909 is the ICD-10-CM diagnosis code for “Epilepsy, unspecified, not intractable, without status epilepticus”. Epilepsy is a tendency to recurrent seizures caused by abnormal electrical activity in the brain.

When is code G40.909 used?

Used for epilepsy, unspecified, not intractable, without status epilepticus. It belongs to Chapter 6 of ICD-10-CM (Diseases of the nervous system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.