Seasonal Affective Disorder

Seasonal Affective Disorder is indexed under Mental Health & Behavioral, Mood Disorders. Also known as SAD, winter depression.

US prevalence

0.5-3% of the general population Source: MedlinePlus Genetics (NLM), Seasonal affective disorder, frequency section last updated May 1, 2019. This figure comes from a professional society, registry, or study rather than a federal source. Label: REPORTED.

ICD-10-CM codes

F33.0

Typical onset

Typically 18-30 onset; more common at higher latitudes

Course

episodic

Body systems

psychiatric

Sex differences

F:M ~4:1

Racial and ethnic differences

Limited 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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