Comprehensive Oncology Services in Northern Virginia

We are highly-experienced cancer specialists dedicated to providing personalized and compassionate care for patients and their families.

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Radiation Services and Technology

Radiation Oncology Associates is the leader in comprehensive and cutting-edge radiation oncology therapy services in convenient and accessible locations across Northern Virginia.

Effective, safe and compassionate patient care is our top priority

Cancer Types

Radiation Oncology Associates is the leader in comprehensive and cutting-edge radiation oncology therapy services in convenient and accessible locations across Northern Virginia.

Breast Cancer

Prostate Cancer

Gynecological Cancer

Musculoskeletal Cancers

Lymphoma

Benign Disease

Pediatric Oncology

Central Nervous System & Brain Tumors

Dupuytren’s Contracture & Leddershose Disease

Lung & Thoracic Cancer

Head & Neck Cancers

Skin Cancers

Colorectal & Gastrointestinal Cancers

Serving the Needs of Patients in the National Capital Region for Decades

Radiation Oncology Associates (ROA) is composed of highly trained, board certified Radiation Oncologists with extensive and up-to-date clinical expertise in the compassionate delivery of cancer care.

Meet Our Doctors

Gopal K. Bajaj

MD, MBA, FASTRO

C. Bryce Johnson

MD, PhD

Ashish Chawla

Tobias Chapman

MD, MPharm

Kevin S. Choe

MD, PhD

Michael J. Eblan

Sarah Gao

Stella Hetelekidis

Daniel Kim

MD, MBA

Emily S. Kowalski

Lonika Majithia

MD, MS

Avani Rao

Helpful Links & Resources for Patients

Navigating the challenges of a cancer diagnosis can be overwhelming. Click below to find valuable resources and assistance from organizations dedicated to helping patients and families throughout their cancer journey. We are here to support you every step of the way.

Patient Reviews

Dr. Bajaj is extremely knowledgeable. He listens to your concerns and takes the time to answer your concerns and questions. He is a compassionate person and a brilliant clinician. I recommend him without reserve!

I went to Dr Choe for radiation treatment after my surgery for breast cancer. He is top notch and so is his staff. He and staff are caring, sensitive, informative and I felt I was getting really good care during a terrible time in my life. I highly recommend him and his staff.

Very likely! Dr. Majithia is the best! She’s very knowledgeable, professional and makes her patients feel special. She cares about her patients.

Consult re treatment options for prostate cancer with Dr. Kanani. Highly professional. Excellent communicator. Excellent description of options with rationale based on research regarding success rates and issues re follow-up care plans. Made feel comfortable and good about his experience. Recommend highly.

Absolutely. Dr. Bajaj is a rock star in his profession. His treatment probably saved my life.

I would definitely recommend Dr. Chapman. He is clear, thorough, answers all questions, and is very understanding and kind. He and his entire staff provided excellent care before, during, and after my radiation treatment.

Latest News

Dr. Lonika Majithia publishes on The Clinical Utility of DCISionRT on Radiation Therapy Decision Making in Patients with Ductal Carcinoma In Situ Following Breast-Conserving Surgery in Annals of Surgical Oncology

Abstract Background The role of radiation therapy (RT) following breast-conserving surgery (BCS) in ductal carcinoma in situ (DCIS) remains controversial. Trials have not identified a…

Dr. Avani Rao publishes on plan quality effects of proton therapy for central nervous system and skull base tumors in Radiotherapy and Oncology

Abstract Purpose With reports of CNS toxicity in patients treated with proton therapy at doses lower than would be expected based on photon data, it…

Dr. Daniel Kim publishes on the implications of practice consolidation among radiation oncologists

Abstract Purpose Health care practices across the United States have been consolidating in response to various market forces. The degree of practice consolidation varies widely…