Epilepsy

Epilepsy is indexed under Neurological & Neurodegenerative, Seizure Disorders. Also known as seizure disorder.

US prevalence

~2.9 million U.S. adults age 18+ reported active epilepsy in 2021-2022; ~456,000 U.S. children age 17 and younger have active epilepsy Source: CDC — Epilepsy Facts and Stats. Federal source. Label: VERIFIED.

ICD-10-CM codes

G40, G40.9

Typical onset

Bimodal: childhood and >55 years

Course

managed

Body systems

neurological

Sex differences

Slightly more common in males

Racial and ethnic differences

Higher prevalence in lower-income populations; disparities in access to specialty care

What this page does not establish

These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.

Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.

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