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Isaac A. Klein, MD, PhD

Medical Oncology

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  • Physician
  • Instructor in Medicine, Harvard Medical School


Clinical Interests

  • Novel therapies for breast cancer

Diseases Treated

Contact Information

  • Appointments617-632-2175 (new)
    617-632-3800 (established)
  • Office Phone Number617-632-3800
  • Fax617-632-1930


Dr. Klein received his undergraduate degree from Cornell University in 2004, followed by a PhD in biology from the Rockefeller University in 2011, and an MD from the Weill Cornell Medical College in 2013. He went on to complete his residency in internal medicine at Brigham and Women's Hospital and a fellowship in Medical Oncology at Dana-Farber Cancer Institute. Dr. Klein is a medical oncologist in the Breast Oncology Center and a researcher at the Whitehead Institute of the Massachusetts Institute of Technology. His research seeks to elucidate the mechanisms of dysregulated gene expression in cancer, and use this understanding to develop more effective therapies.

Board Certification:

  • Internal Medicine, 2016


  • Dana-Farber Cancer Institute, Medical Oncology


  • Brigham and Women's Hospital, Internal Medicine

Medical School:

  • Weill Cornell Medical College


Dana-Farber Cancer Institute
450 Brookline Avenue
Boston, MA 02215
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