Division of Clinical Programs
The Department of Radiation Oncology is a cornerstone of the University of Maryland Greenebaum Comprehensive Cancer Center (UMGCCC), providing the most advanced radiation therapies for the treatment of cancer. Our radiation oncology experts work as part of a multidisciplinary team, along with medical, surgical and other oncology specialists, to deliver a customized treatment plan for each individual patient. This coordinated team approach to cancer care gives our patients access to the widest possible range of treatment options and the best chance for a successful outcome.
The Department of Radiation Oncology has two locations in Baltimore: the downtown acedemic center on the ground floor of the Gudelsky Building at the University of Maryland Medical Center (UMMC), and the Maryland Proton Treatment Center (MPTC).
The Department of Radiation Oncology has community programs at four locations throughout Maryland, including Central Maryland Radiation Oncology (CMRO), in Columbia, MD, Upper Chesapeake Health Kaufman Cancer Center in Bel Air, MD, the Tate Cancer Center at Baltimore Washington Medical Center (BWMC) in Glen Burnie, MD, and the Requard Radiation Oncology Center at University of Maryland Shore Regional Health in Easton, MD.
Each site is staffed with University of Maryland School of Medicine faculty. This affiliation opens the door to leading-edge treatment modalities, cutting-edge clinical trials, and expert consultation with the University of Maryland Greenebaum Comprehensive Cancer Center physicians.
For more information about our clinical program, please visit our University of Maryland Medical Center site. For more information about our clinical research, including clinical trials, click here.
Full-Time University of Maryland School of Medicine Clinical Faculty

William F. Regine, MD, FACR, FASTRO, FACRO
Professor of Radiation Oncology
Isadore & Fannie Schneider Foxman Chair
Executive Director of the Maryland Proton Treatment Center (MPTC)
Interim President of University of Maryland Faculty Practice
UMMC & MPTC
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Mohan Suntha, MD, MBA
Marlene & Stewart Greenebaum Professor of Radiation Oncology
President & CEO of University of Maryland Medical System (UMMS)

Rashmi Benda, MD
Associate Professor of Radiation Oncology
Medical Director, Requard Radiation Oncology Center at UM Shore Regional Health (SRH)

Sally B. Cheston, MD
Associate Professor of Radiation Oncology
Medical Director, Central Maryland Radiation Oncology (CMRO)

Matthew J. Ferris, MD
Assistant Professorof Radiation Oncology
Billing & Compliance Director
Medical Director, Maryland Proton Treatment Center (MPTC)
MPTC & UCH

Jack J. Hong, MD
Assistant Professor of Radiation Oncology
Medical Director, Patricia D. And M. Scot Kaufman Cancer Center (UCH)

Dan K. Kunaprayoon, MD
Assistant Professor of Radiation Oncology
UMMC, MPTC & BWMC

Young Kwok, MD
Professor of Radiation Oncology
MPTC & CMRO
Sarah A. McAvoy, MD
Assistant Professor of Radiation Oncology
Vice Chair for Education
Medical Residency Program Director
BWMC, UMMC & MPTC

Mark V. Mishra, MD
Associate Professor of Radiation Oncology
Director of Clinical Research
Associate Director for UM Cancer Networks
UMMC & MPTC

Jason K. Molitoris, MD, PhD
Assistant Professor of Radiation Oncology
Associate Medical Director, UMMC
UMMC & MPTC

Elizabeth M. Nichols, MD
Associate Professor of Radiation Oncology
Vice Chair for Clinical Affairs
Clinical Director
UMMC & MPTC

Kamila Anna Nowak Choi, MD
Assistant Professor of Radiation Oncology
UCH, UMMC & MPTC

Zaker H. Rana, MD
Assistant Professor of Radiation Oncology
Director of Medical Student Elective Course & Medical Student Research Internships
UMMC & MPTC

Phuoc T. Tran, MD, PhD
Professor of Radiation Oncology
Vice Chair for Research
UMMC & MPTC
Part-Time University of Maryland School of Medicine Clinical Faculty

Pradip P. Amin, MD
Clinical Associate Professor of Radiation Oncology (Non-Adjunct Faculty)
UMMC

Wendla K. Citron, MD
Clinical Assistant Professor of Radiation Oncology
Medical Director, Radiation Oncology at Tate Cancer Center (BWMC)

Sara A. Dudley, MD
Clinical Instructor of Radiation Oncology
CMRO

John P. Mastandrea, MD
Clinical Associate Professor of Radiation Oncology
Requard Radiation Oncology Center at UM Shore Regional Health (SRH)

Vinita Patanaphan, MD
Clinical Associate Professor of Radiation Oncology (Non-Adjunct Faculty)
UMMC & UCH
Akshar N. Patel, MD
Visiting Assistant Professor of Radiation Oncology
BWMC

Melissa Ana Liriano Vyfhuis, MD, PhD
Visiting Assistant Professor of Radiation Oncology
BWMC
Volunteer University of Maryland Faculty
- Christine K. Bang, MD, Adjunct Assistant Professor of Radiation Oncology, BVAMC
- Warren D. D'Souza, PhD, MBA, FAAPM, Adjunct Professor of Radiation Oncology
- Mandira Mehra, MD, Adjunct Instructor of Radiation Oncology
- Danny Y. Song, MD, Clinical Associate Professor of Radiation Oncology
- Keith R. Unger, MD, Adjunct Assistant Professor of Radiation Oncology
- Zeljko Vujaskovic, MD, PhD, Adjunct Professor of Radiation Oncology
- Matthew E. Witek, MD, MS, Associate Professor of Radiation Oncology