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Robert D Stewart, MD Email Robert Stewart

Radiation Oncology
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Mount Sinai Doctors ?
    • Position
    • ASSISTANT PROFESSOR | Radiation Oncology
    • Specialty
    • Radiation Oncology
    • Language
    • English
    • Hospital Affiliations
    • The Mount Sinai Hospital
    • New York Eye and Ear Infirmary of Mount Sinai
    • Mount Sinai Morningside and Mount Sinai West
    • Mount Sinai Beth Israel
    • Phone
    • Mount Sinai Union Square 212-844-8486
    • The Blavatnik Family – Chelsea Medical Center 212-604-6080
Request an Appointment
  • The Blavatnik Family – Chelsea Medical Center
    325 West 15th Street
    (between 8th and 9th Avenues)
    New York, NY 10011
    Phone: 212-604-6080

Robert Stewart, M.D., is a radiation oncologist specializing in the treatment of Head and Neck, Genitourinary and Ocular Malignancies.  He uses many advanced techniques such Intensity Modulated Radiation Therapy (IMRT), Image Guided Radiation Therapy (IGRT), Stereotactic Body Radiation Therapy (SBRT), and brachytherapy to maximize local control and cure of the cancer while minimizing radiation side effects to healthy tissue.

Dr. Stewart graduated from Dalhousie University with a medical degree.  He completed his Residency in Radiation Oncology at the Juravinski Cancer Center through McMaster University. Dr. Stewart then went on to complete a Fellowship in Brachytherapy through the Icahn School of Medicine at Mount Sinai Beth Israel Hospital.

Dr. Stewart’s primary research focus is attempting to improve clinical outcomes while limiting side effects in management of prostate cancer.  In addition, Dr. Stewart has conducted research in the areas of adaptive treatment for Head and Neck Cancer and Intraoperative Radiotherapy.  His work has resulted in multiple presentations at international meetings.



Radiation Oncology

Clinical Focus


MD, Dalhousie University

Residency, Radiation Oncology
McMaster University

Fellowship, Radiation Oncology
Beth Israel Medical Center