Our Team

Dr. Divya Arora was born in Dallas, Texas and grew up in North Carolina and Florida. She attended the University of Florida for her undergraduate education with a major in Nutritional Sciences in 2007. She then received a Master’s in Biomedical Sciences at Tufts University in 2008. She graduated from the University of South Florida Medical School in 2012.

After completing her internship in Internal Medicine, she then completed her residency in Radiation Oncology at Baylor Scott and White in Temple, Texas in 2017. Prior to joining Mary Washington Hospital and Stafford Hospital in 2022, she served as the sole Radiation Oncologist at Holzer Cancer Center in Gallipolis, Ohio.

Her practice interests include general radiation oncology, breast cancer, and lung cancer. She is a member of ASTRO (American Society for Radiation Oncology), ASCO (American Society for Clinical Oncology), and ACRO (American College of Radiation Oncology). She lives with her husband and two children in Stafford, Virginia. In her spare time, she loves hiking, Indian dance (Bhangra), and spending time with her family.

Education

Residency: Baylor Scott and White Hospital
Internship: Baylor Scott and White Hospital
Medical School: University of South Florida, Morsani Medical College
Graduate School: Tufts University
Undergraduate School: University of Florida

Dr. David F. Cousins is a board-certified Radiation Oncologist with expertise in advanced radiation therapy techniques and comprehensive cancer care across a wide range of disease sites. He has practiced within nationally recognized cancer programs, including the University of Pittsburgh Medical Center (UPMC) Hillman Cancer Center network. Dr. Cousins has extensive experience providing state-of-the-art radiation treatments including 3DCRT, IMRT, SBRT, linac-based SRS, and HDR brachytherapy.

Dr. Cousins is committed to delivering high-quality, patient-centered care and has consistently achieved outstanding patient satisfaction scores. In addition to his clinical work, he actively participates in multidisciplinary cancer committees, quality assurance initiatives, and accreditation oversight. His background includes advanced training at the University of Virginia’s NCI-designated Comprehensive Cancer Center, as well as specialized international training at the Heidelberg Ion-Beam Therapy Center in Germany focusing on proton and carbon ion therapy.

Education

Education: M.D., University of Arkansas for Medical Sciences
Residency in Radiation Oncology, University of Virginia Medical Center
Transitional Year Internship, Arkansas Children’s Hospital / UAMS Medical Center
B.S. in Chemical Engineering, University of Arkansas

Professional Highlights

Board Certified in Radiation Oncology, American Board of Radiology (ABR)
Experienced in advanced treatment modalities including IMRT, SBRT, SRS, HDR brachytherapy, Gamma Knife radiosurgery, proton therapy, carbon ion therapy, MR-linac, and CyberKnife systems
Extensive experience in multidisciplinary cancer care, quality assurance, and accreditation initiatives within ACR-certified programs
Recipient of the Roentgen Resident/Fellow Research Award
Published author with research focused on stereotactic radiotherapy, brachytherapy, head and neck cancer, immune cell sparing, and spinal metastases
Member of ASTRO, Pennsylvania Medical Society, and Lycoming County Medical Society

Dr. Mark Macedon grew up in the Chicago area where he attended the prestigious Illinois Mathematics and Science Academy before completing his undergraduate education at Northwestern University. He graduated from the University of Minnesota Medical School in 2003. After completing his internship at the Marshfield Clinic in Marshfield, WI, he then completed his residency at New York Methodist Hospital in Brooklyn, NY. During his residency, he also received training at Memorial Sloan Kettering Cancer Center in New York, NY; at Brigham & Women’s Hospital (part of Harvard University) in Boston, MA and at the University of Texas Southwestern Medical Center in Dallas, TX. Prior to joining Mary Washington Hospital and Stafford Hospital in 2011, he served as Assistant Professor of Radiation Oncology at the Medical College of Wisconsin in Milwaukee, WI.

His practice interests include general radiation oncology, head and neck cancer, breast cancer, and stereotactic body radiosurgery. He is a member of ASTRO(American Society for Radiation Oncology), ASCO(American Society for Clinical Oncology) , and the American Brachytherapy Society. He lives with his wife and daughter in Stafford, VA. His interests include classical music, travel, and outdoor recreation.

Education

Medical School: University Of Minnesota Medical School
Internship: Marshfield Clinic/St. Joseph Hospital
Residency: New York Methodist
Undergraduate School: Northwestern University

Dr. Christian Chinedu Okoye is a board-certified Radiation Oncologist with more than 9 years of post-residency experience providing advanced cancer care and leading quality improvement initiatives within regional cancer centers. He has extensive experience overseeing all aspects of radiation therapy, including patient evaluation, treatment planning, and radiation delivery for both benign and malignant diseases. Dr. Okoye has practiced at leading institutions including Mercy Medical Center in Baltimore, MD and St. Bernards Medical Center in Jonesboro, AR.

In addition to his clinical expertise, Dr. Okoye has held numerous leadership roles focused on accreditation, healthcare operations, patient safety, and process improvement. He has worked closely with healthcare IT teams to optimize electronic health records, improve documentation efficiency, and enhance patient throughput. Dr. Okoye also serves in national leadership roles within the American Society for Radiation Oncology (ASTRO), including Chair of the Strategic Projects Subcommittee within the Communications Committee.

Education

M.D., University of California, San Francisco School of Medicine
M.B.A., Indiana University Kelley School of Business
Residency in Radiation Oncology, University Hospitals / Case Western Reserve University
Preliminary Internship in Internal Medicine, University of Maryland Medical Center
B.S. in Electrical Engineering, University of California, Davis

Professional Highlights

Board Certified, American Board of Radiology (ABR)
Experienced in advanced radiation oncology techniques including IMRT, SBRT, IGRT, HDR and LDR brachytherapy, IORT, and systemic radiopharmaceutical therapies
Extensive experience with Varian TrueBeam technology and oncology software platforms including Eclipse, Mosaiq, Velocity, Epic, ARIA, and MIMVista
Led departmental accreditation initiatives through ACR, CoC, ACRO, and ASTRO APEx standards
Published author and peer reviewer with contributions to radiation oncology research, quality improvement, stereotactic radiotherapy, and healthcare operations
Active member of multiple professional organizations including ASTRO, ASCO, ABS, ESTRO, RSS, and AMA