G40.00 — Local-rel (focal) idio epi w seiz of loc onset, not ntrct

G40.00 is the ICD-10-CM 2025 code for Local-rel (focal) idio epi w seiz of loc onset, not ntrct. Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.

G40.00 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under G40.00. Browse the sub-codes listed on this page.

G40.00 belongs to the chapter "Diseases of the nervous system" (codes G00-G99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.

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