Attention-Deficit/Hyperactivity Disorder

Attention-Deficit/Hyperactivity Disorder is indexed under Mental Health & Behavioral, Neurodevelopmental. Also known as ADHD, ADD.

US prevalence

~6 million children (~9.8%); ~4.4% of adults (~10 million) Source: CDC; NIMH; NCS-R. Federal source. Label: VERIFIED.

ICD-10-CM codes

F90.0, F90.1, F90.2, F90.9

Typical onset

Childhood onset by definition; increasingly recognized in adults

Course

lifelong

Body systems

psychiatric, neurological

Sex differences

M:F ~2:1 in children; closer to equal in adults (women underdiagnosed)

Racial and ethnic differences

Historically underdiagnosed in Black and Hispanic children; gap narrowing

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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