About Us


Since 1982, Mission Viejo Radiation Oncology has provided the highest quality cancer care in South Orange County through the application of advanced technology and the expertise of our board-certified radiation oncologists.  Our three experienced physicians oversee a caring treatment team dedicated to making our patients’ experience with us as comfortable as possible.  Dr. Young, Dr. Chou, and Dr. Hyden are leaders in radiation oncology, with more than 50 years of combined experience in both academic and professional settings, including USC, UCLA, Stanford, and Memorial Sloan-Kettering Cancer Center. 

The Mission Viejo team delivers a variety of advanced treatment options to our patients, including Intensity-Modulated Radiation Therapy (IMRT), Image-Guided Radiation Therapy (IGRT), MammoSite, 3D Conformal treatment planning, prostate seed implants, and High Dose Rate (HDR) brachytherapy.  With experience and expertise in the treatment of all cancer types, the Mission Viejo team is committed to providing expert cancer care in a supportive and compassionate environment.