Autism Spectrum Disorder

Autism Spectrum Disorder is indexed under Mental Health & Behavioral, Neurodevelopmental. Also known as ASD, autism.

US prevalence

~1 in 36 children (CDC ADDM 2024); ~5.4 million adults Source: CDC ADDM Network 2024. Federal source. Label: VERIFIED.

ICD-10-CM codes

F84.0

Typical onset

Lifelong; typically diagnosed by age 4-5 (improving with early screening)

Course

lifelong

Body systems

neurological, psychiatric

Sex differences

M:F ~3.8:1 (gap narrowing with better recognition in girls/women)

Racial and ethnic differences

Similar prevalence when screened equally; historically underdiagnosed in Black and Hispanic children

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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