Pictured: James A. Fagin

James A. Fagin, MD

Endocrinologist & Internist


Chief, Endocrinology Service

Clinical Expertise

Thyroid Cancers

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Accepted Insurance Providers

Dr. Fagin accepts the following list of insurance providers. Select your insurance provider to see more details.

Contact and Location

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Find a Convenient Location

Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offers many services, including screening, chemotherapy, and medical testing.

About Me


MD, University of Buenos Aires School of Medicine (Argentina)


Rawson Hospital (Buenos Aires, Argentina); Horton General Hospital, Hammersmith, Middlesex and West Middlesex Hospitals (London, UK)


Hospital Italiano (Buenos Aires); VA Wadsworth Medical Center (Los Angeles); Cedars-Sinai Medical Center (Los Angeles)

Board Certifications

Internal Medicine: Endocrinology and Metabolism

I am a board-certified endocrinologist and internist, and I treat patients with thyroid cancer. I am the Chief of the Endocrinology Service at Memorial Sloan Kettering, which has a tradition of excellence in both basic and clinical research in thyroid cancer, and in the care of patients with the disease.

Many patients with thyroid cancer can be successfully treated with surgery, and sometimes no further treatment is necessary. About a quarter of patients, though, have frequent recurrences. Since coming to Memorial Sloan Kettering, I have focused my research efforts on finding new treatments for patients with more-advanced thyroid cancer and more-aggressive forms of the disease.


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

Clinical Trials

Smiling doctors in the lab

Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

Research and Publications

My research is dedicated to understanding the genetic basis and the biology of thyroid cancers, and identifying potential targets for new molecular-based therapies for these diseases.

View Dr. Fagin's Lab

Publications on PubMed

Visit PubMed for a full listing of Dr. Fagin’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.