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Mark Ewing Chisam, MD

Cancer Care, Radiation Oncology

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Mark Ewing Chisam, MD

About Mark Ewing Chisam, MD

After earning his medical degree from the Uniformed Services University of the Health Sciences, Dr. Chisam completed his residency at the National CancerInstitute. He is board certified by the American Board of Radiology with certification in the subspecialty of radiation oncology.

Intrigued by the biology and physics of radiation therapy to fight cancer, Dr. Chisam is also a recent cancer survivor himself, making him especially empathetic towards his patients. He specializes in image-guided radiation therapy, intensity-modulated radiation therapy for the head and neck, and treatments for skin, breast and prostate cancers.

Originally from Los Angeles, Dr. Chisam is a 24-year veteran of the U.S. Navy and was also trained as a nuclear engineer prior to his medical career. He is currently pursuing a master's degree in theology. Dr. Chisam and his wife have four adult children.


Medical: Uniformed Services University of Health Sciences
Residency: National Cancer Institute-Surgery Branch
Internship: National Naval Medical Center

Board Certifications

American Board of Radiology - Radiation Oncology


Riverside Radiation Oncology Specialists - Williamsburg

3901 Treyburn Drive, B, Williamsburg, VA 23185



Riverside Radiation Oncology Specialists - Gloucester

7544 Medical Drive, Gloucester, VA 23061



Blog Articles

Featuring: Mark Ewing Chisam, MD

Cancer Urology

What is IMRT?

Learn More Woman Receiving Radiation Therapy Treatments for cancer

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