Yes. Each 'type' refers to the lack of a specific clotting factor.
Factors VIII and IX are the most common deficiencies, however others do exist.
Factor VIII deficiency is known as Haemophilia A while Haemophilia B refers to deficiency of Factor IX.
Haemophilia can be mild, moderate or severe, depending on the degree of the deficiency (i.e. how much factor is missing).
Last Reviewed: 24 May 2007