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Deborah C Marshall, MD Email Deborah Marshall

Radiation Oncology
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Mount Sinai Doctors ?
    • Position
    • ASSISTANT PROFESSOR | Radiation Oncology
    • Specialty
    • Radiation Oncology
    • Language
    • English
    • Hospital Affiliations
    • Mount Sinai Beth Israel
    • The Mount Sinai Hospital
    • Mount Sinai Morningside and Mount Sinai West

Deborah C. Marshall is an Assistant Professor in the Department of Radiation Oncology and in the Blavatnik Family Women’s Health Research Institute at the Icahn School of Medicine at Mount Sinai.  She is also a member of the Cancer Prevention and Control Program of the Tisch Cancer Institute.  After completing a combined medical and graduate degree at the University of California San Diego (UCSD) School of Medicine, she completed her transitional year internship at Memorial Sloan Kettering Cancer Center and residency in Radiation Oncology at UCSD and ISMMS. During residency, she conducted research as part of the American Board of Radiology Holman Research Pathway and an NIH T32 postdoctoral fellowship.

Dr. Marshall is a physician with clinical expertise centered on treating young adults with cancer and those with breast, gastrointestinal and gynecologic cancers.  She approaches each individual with the goal of maximizing the benefits of treatment while minimizing side effects using targeted approaches such as proton therapy and image-guided radiation therapy to create a highly customized radiation therapy plan.  Her team's focus is providing compassionate care for the whole patient and their caregivers with a commitment to excellence in clinical oncology care. 

In addition to providing advanced radiotherapy to a diverse population of cancer patients, Dr. Marshall directs an NIH-funded laboratory aiming to advance the understanding of the impacts of radiotherapy on sexual function in women and female-bodied cancer patients across the lifespan. By applying radiobiologic, imaging, and multi-omic methods in human research, her goal is to prevent and mitigate the effects of radiotherapy on sexual function and to improve quality of life after cancer treatment.  She also investigates the impacts of transparency policies in medicine and improving oncology outcomes in female patients, sexual and gender minorities, and persons living with HIV.  

Clinical Focus

Research Topics

Biomedical Sciences, Breast Cancer, Cancer, Clinical Genomics, Epidemiology, Epigenomics, HIV/AIDS, Health Services Research, Imaging, Palliative Care, Patient Centered Outcomes Research, Personalized Medicine, Translational Research


MD, University of California, San Diego

MAS, University of California San Diego

Internship, Oncology
Memorial Sloan Kettering

Residency, Radiation Oncology
University of California San Diego School of Medicine

Residency, Radiation Oncology
Icahn School of Medicine at Mount Sinai