Chronic Spontaneous Urticaria

Chronic Spontaneous Urticaria is indexed under Dermatologic, Urticarial / Allergic. Also known as CSU, chronic idiopathic urticaria, chronic hives.

US prevalence

~0.5-1% of population (~1.5-3.3 million) Source: AAAAI; JAAD 2022. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.

ICD-10-CM codes

L50.1, L50.8

Typical onset

Age 20-50; persists >6 weeks by definition

Course

episodic

Body systems

dermatologic, immune

Sex differences

F:M ~2:1

Racial and ethnic differences

Limited race-stratified data

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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