Psoriasis

Psoriasis is indexed under Dermatologic, Inflammatory Skin Disease. Also known as plaque psoriasis, guttate psoriasis.

US prevalence

~7.5 million adults (~3.0%) Source: NPF; AAD. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.

ICD-10-CM codes

L40.0, L40.9

Typical onset

Bimodal: 15-25 and 50-60; can occur at any age

Course

episodic

Body systems

dermatologic, musculoskeletal

Sex differences

Roughly equal

Racial and ethnic differences

More commonly diagnosed in white populations; may be underdiagnosed in darker skin

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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