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G40.0

Non-billable

Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset

G40.0 is the ICD-10-CM code for Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset. It is a non-billable category code — use a more specific child code such as G40.00 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G40
Subcodes
2
Edition
FY2026

G00-G99 Diseases of the nervous system

Includes

  • •Benign childhood epilepsy with centrotemporal EEG spikes
  • •Childhood epilepsy with occipital EEG paroxysms

Excludes1 — not coded here

  • •adult onset localization-related epilepsy (G40.1-, G40.2-)

Frequently asked questions

What is ICD-10 code G40.0?
G40.0 is the ICD-10-CM code for "Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset". It falls under G00-G99 Diseases of the nervous system.
Is G40.0 a billable code?
No — G40.0 is a non-billable header code. Use a more specific child code (such as G40.00) for billing.
What are the subcodes of G40.0?
G40.0 has 2 more specific child codes, including G40.00, G40.01.
What is excluded from G40.0?
Excludes1 (not coded here): adult onset localization-related epilepsy (G40.1-, G40.2-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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