He also practices at the Cheryl R. Lindenbaum Comprehensive Care Center at NewYork-Presbyterian/ Hudson Valley. He cares for patients with various malignancies, including breast cancer and head/neck cancer. Dr. Oster received his M.D. from Columbia University. He did his Internal Medicine residency at Harvard/ Massachusetts General Hospital and completed his Medical Oncology fellowship at the National Cancer Institute. Dr. Oster is actively involved in all aspects of oncology patient care, as well as participating in clinical research and teaching at Columbia.