Hemophilia is an X-linked congenital bleeding disorders. Patient outreach involves indentifiying individual with hemophilia who have not yet been diagnosed. By analysis 874 family'members of 54 pedigrees of 54 patients with hemophilia diagnosed at National Institute of Hematology and Blood Transfusion, the authors have discovered 101 new patients including 82 patients with hemophilia A (81.2 percent), 19 patients with hemophilia B (18.8 percent) and most of them have mild and moderate hemophilia, severe hemophilia accounted for 14.8 percent. The average age of diagnosis in patients is 20.05 + or - 17.46, ranging from immediately after birth to 65 years old. Most of families can explore the pedigree within 3-5 generation. Outreach by analysis of hemophilia patients' pedigree can help to discover undiagnosed in a family with history of hemophilia effectively.