Lichen Planus

Lichen Planus is indexed under Dermatologic, Inflammatory Skin Disease. Also known as LP, oral lichen planus.

US prevalence

~1-2% of adults Source: AAD. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.

ICD-10-CM codes

L43.9

Typical onset

30-60 years

Course

managed

Body systems

dermatologic, mucosal

Sex differences

F:M ~1.5:1 for oral; cutaneous roughly equal

Racial and ethnic differences

Oral LP may be more common in South Asian populations

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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