Dr. Ratner is also a member of the American Society of Clinical Oncology, the American College of Physicians, and New York Academy of Medicine, and served as Executive Vice President of the Israel Research Fund, from 1992-2000; Medical Director of W.R. Grace Corporation, from 1984-1987; Associate Medical Director of the Chemotherapy Foundation of New York, from 1979-1984, Course Director for Lymphoma Symposium at Lennox Hill Hospital, in 1993, and was the Director of Medical Education Division of Hematology-Oncology at Lennox Hill Hospital.
At Cornell University, Dr. Ratner was a Fellow, and an instructor. He was also Chief Resident at the Memorial Hospital for Cancer and Allied Diseases.
Dr. Ratner is currently an attending physician at Lennox Hill Hospital in New York, NY, is an Assistant Clinical Professor of Medicine and Neoplastic Diseases at Mount Sinai School of Medicine, and is also an Educational Coordinator of Medical Oncology at Lennox Hill Hospital.
His recent publications included, Contemporary Diagnosis and Management of Breast Cancer.