Alexander Helfand, MD Alexander Helfand, MD, is a medical oncologist and hematologist with AHN Cancer Institute, specializing in providing compassionate and empathetic oncologic and hematologic care. He diagnoses and treats blood-related illness and cancer. Dr. Helfand went to medical school at Sackler School of Medicine, New York State/American Program, in Tel Aviv, Israel. Upon completion of medical school, he did his residency at Weill Cornell Medicine: New York Presbyterian – Brooklyn Methodist Hospital in Brooklyn, New York and his fellowship in hematology/oncology at Allegheny General Hospital in Pittsburgh, Pennsylvania. Dr. Helfand is certified by the American Board of Internal Medicine and is affiliated with the American Society of Hematology and the American Society of Clinical Oncology. He speaks Spanish and Hebrew and sees patients ages 18 and older.