© Lynn Herbert Ratner MD

The Oncologists at Our New York Cancer Treatment Center

All of our physicians are affiliated with Mt. Sinai and Lenox Hill hospitals and the Mt. Sinai School of Medicine

Lynn Herbert Ratner MD

Board certified in Medical Oncology and Internal Medicine

NYC oncologist Lynn H Ratner MD

Dr. Lynn Ratner is Assistant Clinical Professor of Medicine and Neoplastic Disease at the Mount Sinai School of Medicine, NY, and is also Education Coordinator for Medical Oncology at Lenox Hill Hospital in New York City. He is the author of a 309-page medical handbook on breast cancer that is in its second edition. Titled Contemporary Diagnosis and Management of Breast Cancer, the book is used by medical and nursing professionals.

Dr. Ratner has often been named one of NYC's Top Doctors and is a frequent speaker and presenter at medical conferences on the topics of breast cancer, lung cancer and colorectal cancer. He regularly participates in clinical trials in a number of different cancer categories. From 2006 to 2010 he was the Principal Investigator for a trial of a new medicine for treatment of neuroendocrine tumors of the pancreas and also recently participated in two major trials for non-small cell lung cancer and another trial for treatment of colorectal cancer.

Doctor Ratner was recently interviewed on channel 11 and on channel 2 about the need for genetic testing in breast cancer and the heightened interest in preventative mastectomy.

Doctor Ratner speaks English, Yiddish and Spanish

NYC oncologist Paul A C Greenberg MD

Paul Alan Cecil Greenberg MD FACP

Board certified in Medical Oncology and Internal Medicine

Dr. Paul Greenberg has published extensively in the field of breast cancer and has participated in studies regarding inherited mutations and cancer risk. He has worked in the field of breast oncology for two decades and has lectured to various community and physician groups as well as pharmaceutical companies and been a featured guest on television regarding this subject.

Dr. Greenberg is a second generation oncologist. Before joining Drs Ratner, he was in private practice with his father, Dr. Ernest Greenberg, who was a world-renowned breast oncologist until his retirement.

Dr. Greenberg did his oncology training at MD Anderson Cancer Center in Houston Texas. He is the vice president for medical affairs at the Greenberg Breast Cancer Research Foundation (formally the Breast and Prostate Cancer Research Foundation Inc.). He specializes in breast cancer as well as colon cancer and prostate cancer and is an attending physician at both Mount Sinai and Lenox Hill Hospitals in Ney York City. Dr. Greenberg is also Assistant Clinical Professor in the department of Hematology and Oncology at Mount Sinai School of Medicine. From 1989-1992 Dr. Greenberg was a faculty associate at MD Anderson Cancer Center in Houston. He has been a Consulting Medical Expert for Health And Human Services Administration since 1995 and has been Vice President of the New York Cancer Society since 2008.

Dr. Greenberg believes that more is not always better. Quality of life is paramount: it is more important to match the treatment with the patient rather than only with the disease.

Doctor Greenberg speaks English, French, and Spanish

Our Nurses and Technologists


"We keep the treatment center quiet and calm to help patients relax." Julia is an oncology nurse working with cancer patients for almost 30 years. In 2011 Julia received the Mount Sinai Medical Center Board of Trustees Excellence in Nursing Practice Award


"I try to make each day a happy day for my patients. Not a chemo day." Izabel is an oncology nurse who has been administering chemotherapy drugs for 22 years


"The most important thing I can do is treat patients with compassion and respect." Medical assistant Galina is constantly measuring patient blood counts before and during treatments

Our Support Staff


"It is so great to see the patients get better." You'll see Lauren at the front desk, making radiology appointments, registering new patients and dealing with lots of paperwork.


Natalya and Bianca are important members of our staff you may only meet on the phone. They help keep all your medical bills organized.


Lynn H Ratner MD
Paul A C Greenberg MD

112 East 83rd Street
New York City, NY 10028
tel: 1-212-396-0400 fax: 1-212-396-9800

Click for appointment and contact information


Doctors Ratner and Greenberg


All of our physicians are affiliated with Mt. Sinai and the Mt. Sinai School of Medicine