How is hemophilia diagnosed?

A doctor will perform a physical examination to rule out other conditions. If you have symptoms of hemophilia, the doctor will ask about your family’s medical history, since this disorder tends to run in families. In children with severe hemophilia, the diagnosis is usually made in infancy, either at circumcision, or when the toddler starts to walk and sustains minor injuries when falling.

Blood tests are then performed to determine how much factor VIII or factor IX is present. These tests will show which type of hemophilia you have and whether it is mild, moderate, or severe, depending on the level of clotting factors in the blood:

  • People who have 5%-30% of the normal amount of clotting factors in their blood have mild hemophilia.
  • People with 1%-5% of the normal level of clotting factors have moderate hemophilia.
  • People with less than 1% of the normal clotting factors have severe hemophilia.

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