Narcolepsy

Narcolepsy is indexed under Neurological & Neurodegenerative, Sleep Disorders. Also known as narcolepsy type 1, narcolepsy type 2, narcolepsy with cataplexy.

US prevalence

~200,000 (~1 in 2,000) Source: NIH NINDS; Narcolepsy Network. Cites federal and non-federal sources, and the record does not say which one gave this figure. Label: REPORTED.

ICD-10-CM codes

G47.41, G47.42

Typical onset

Bimodal peaks: ~15 years and ~35 years

Course

lifelong

Body systems

neurological

Sex differences

Roughly equal

Racial and ethnic differences

Limited data; may be underdiagnosed broadly

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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