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Marios Giannakis, MD, PhD

Medical Oncology

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Marios Giannakis, MD, PhD


  • Physician
  • Assistant Professor of Medicine, Harvard Medical School


Clinical Interests

  • Gastrointestinal cancers

Contact Information

  • Appointments617-632-5929
  • Office Phone Number617-582-7263
  • Fax617-632-5370


Dr. Giannakis received his undergraduate degree from the University of Toronto in 2001 and his medical and doctoral degrees from Washington University School of Medicine in 2009. He subsequently completed his Internal Medicine residency at Brigham and Women’s Hospital and his fellowship in Medical Oncology and Hematology at Dana-Farber Cancer Institute.

Dr. Giannakis is a medical oncologist and clinical investigator at the Dana-Farber Gastrointestinal Cancer Center. He also conducts research at Dana-Farber and the Broad Institute of MIT and Harvard to understand the molecular mechanisms of colorectal cancer formation and develop novel targeted and immune-based treatments for gastrointestinal cancers.

Board Certification:

  • Hematology, 2014
  • Internal Medicine, 2012
  • Medical Oncology, 2014


  • Dana-Farber/Partners CancerCare, Medical Oncology and Hematology


  • Brigham and Women's Hospital, Internal Medicine

Medical School:

  • Washington University School of Medicine



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