Dr. Diuguid received his undergraduate degree from Harvard College where he graduated cum laude. He matriculated at Weill Cornell and received his medical degree in 1979. He did residency at Boston University Medical Center where he served as Chief Resident from 1982 to 1983. He then completed his fellowship training at Tufts New England Medical Center in Boston and served on the faculty there for three years before coming to Columbia. Dr. Diuguid cares for patients with both bleeding and clotting disorders with a special emphasis on patients with a history of increased risk of clotting problems. He also cares for patients with hematological malignancies including lymphoma, acute and chronic leukemia, and myeloma. He currently is involved in patient care, clinical research, and teaching on the hematology service. He serves as Head of the Coagulation Service and is also Head of the Section of Hematology.