300 Longwood Avenue Boston, MA 02115 (617) 355-6000 Clinical Services (Boston Hemophilia Center): Diagnosis Hemophilia is diagnosed after a complete medical history, physical examination and a variety of blood tests including complete blood counts (CBC), clotting factor levels and/or DNA testing. Your child's physician may also request details about family history. The information on this website should not be taken as medical advice, which can only be given to you by your personal health care professional. Copyright © Children's Hospital Boston. All rights reserved.