Hemophilia

Hemophilia is indexed under Hematologic, Bleeding Disorders. Also known as hemophilia A, hemophilia B, factor VIII deficiency, factor IX deficiency.

US prevalence
As many as 33,000 males in the United States are estimated to be living with hemophilia; the exact number is unknown Source: CDC — Data and Statistics on Hemophilia. Federal source. Label: VERIFIED.
ICD-10-CM codes
D66, D67
Typical onset
Diagnosed in infancy/childhood; lifelong
Course
lifelong
Body systems
hematologic, musculoskeletal
Sex differences
Primarily males (X-linked recessive); carriers can have symptoms
Racial and ethnic differences
Affects all racial/ethnic groups equally

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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