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ICD-10-CM/Diseases of the nervous system

G40-G47

Episodic and paroxysmal disorders (G40-G47)

G40-G47 contains 6 categories and 307 ICD-10-CM codes for FY2027.

G40Epilepsy and recurrent seizures58 billable
G43Migraine48 billable
G44Other headache syndromes40 billable
G45Transient cerebral ischemic attacks and related syndromes7 billable
G46Vascular syndromes of brain in cerebrovascular diseases9 billable
G47Sleep disorders43 billable

Every ICD-10-CM code, and whether you can actually bill it

Built directly from the official ICD-10-CM FY2027 release published by the CDC / National Center for Health Statistics and CMS.

FY2027 codes are valid for encounters from October 1, 2026 through September 30, 2027.

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