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G40.3

Non-billable

Generalized idiopathic epilepsy and epileptic syndromes

G40.3 is the ICD-10-CM code for Generalized idiopathic epilepsy and epileptic syndromes. It is a non-billable category code — use a more specific child code such as G40.30 for billing.

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

G00-G99 Diseases of the nervous system

Notes

  • •MERRF syndrome, if applicable (E88.42)

Frequently asked questions

What is ICD-10 code G40.3?
G40.3 is the ICD-10-CM code for "Generalized idiopathic epilepsy and epileptic syndromes". It falls under G00-G99 Diseases of the nervous system.
Is G40.3 a billable code?
No — G40.3 is a non-billable header code. Use a more specific child code (such as G40.30) for billing.
What are the subcodes of G40.3?
G40.3 has 2 more specific child codes, including G40.30, G40.31.

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

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