Frank B. Dorsa, MD

Dr. Stoopler received his Bachelor of Science degree from Tulane University in 1971 and his medical degree from Cornell University Medical College in 1975. He completed his residency at North Shore University Hospital/Memorial Hospital and his oncology fellowship at Memorial Sloan-Kettering Cancer Center in New York City before joining the Columbia faculty in 1980. He is a Fellow of the American College of Physicians and a member of the American Society of Clinical Oncology, the International Association for the Study of Lung Cancer, the International Society of Gastrointestinal Oncology, the American Federation for Clinical Research and the Southwest Oncology Group. Dr. Stoopler is involved in patient care, clinical research and teaching on the medical oncology service.

Dr. Tarkin is Board Certified in Internal Medicine and Cardiology. He is a graduate of SUNY College at Oneonta and received his medical degree from SUNY Health Science Center at Brooklyn- College of Medicine. Dr. Tarkin completed his fellowship at the University of Connecticut Health Center. He practices from the Cortlandt Manor location. Dr. Tarkin is an Assistant Clinical Professor of Medicine at Columbia University Medical Center.

Ronen Harel, DO is an Assistant Professor of Medicine at Columbia University Medical Center. After receiving a B.S. at Binghamton University, Dr. Harel obtained his degree in Osteopathic Medicine at the New York Institute of Technology College of Osteopathic Medicine. He completed his Internal Medicine Internship, Internal Medicine Residency and his Fellowship in Hematology & Medical Oncology at Lenox Hill Hospital. He has experience in treating colon, breast, malignant and benign hematology disorders. He specializes in cancer diagnosis and treatment. He is accepting new patients at his NewYork-Presbyterian Medical Group Hudson Valley office located at 1978 Crompond Road, Suite G1, Cortlandt Manor, NY 10567. To schedule an appointment call 914-293-8400.