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Hemophilia B

Disease definition

Hemophilia B is a form of hemophilia (see this term) characterized by spontaneous or prolonged hemorrhages due to factor IX deficiency.


  • Synonym(s):
    • Christmas disease
    • Factor IX deficiency
  • Prevalence: 1-9 / 100 000
  • Inheritance: X-linked recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: D67
  • OMIM: 306900
  • UMLS: C0008533
  • MeSH: D002836
  • GARD: 8732
  • MedDRA: 10016077

Detailed information

Article for general public


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