John Harpel, MD, PhD
Division of Hematology/Oncology
Dr. Harpel received his undergraduate degree from Harvard College where he graduated magna cum laude, and received his MD and PhD degrees as part of the NIH-funded Medical Scientist Training Program at the NYU School of Medicine. His residency in Internal Medicine and fellowships in Hematology/Medical Oncology were at the New York Presbyterian Hospital/Weill Cornell Medical Center where he also served on faculty. Prior to joining Columbia University Medical Center, Dr. Harpel was in the Division of Hematology at Rutgers-Robert Wood Johnson Medical School specializing in non-malignant hematology and participating in their state- and federally-funded regional Hemophilia Center, regional comprehensive sickle cell center, and thrombosis center.
Dr. Harpel specializes in the diagnosis and management of patients with acquired or Inherited hematologic disorders resulting in bleeding, clotting, or cytopenias- anemia, leukopenia, and thrombocytopenia. He has particular interest and experience in immune-mediated hematologic disorders such as immune thrombocytopenic purpura (ITP), heparin-induced thrombocytopenia (HIT), thrombotic thrombocytopenic purpura (TTP), complement-mediated thrombotic microangiopathy (i.e. atypical hemolytic uremic syndrome (aHUS)), autoimmune hemolytic anemia (AIHA), and acquired hemophilias.