Physicians

Tacoma Valley Radiation Oncology Centers use a team approach for patient care. Within our centers, our board-certified radiation oncologists lead a highly trained health care team. We have full-time board-certified medical physicists and dosimetrists who work closely with our physicians to ensure optimal treatment planning and delivery. Our therapists are certified by the American Registry of Radiological Technologists in Radiation Therapy. Our physicians work closely with your other doctors to provide a coordinated delivery for your care.

Dr. Dean Mastras

Dr. Mastras earned his bachelor’s degree from Lehigh University and his medical degree from University of Vermont. He completed his...

Dr. Herbert Wang

Dr. Wang earned his medical degree from the University of California at Davis, School of Medicine. He completed a one-year...

Dr. Nathan Bittner

Dr. Bittner has a long list of academic and professional achievements to his credit, and he’s a valued member of...

Dr. Ann Pittier

Dr. Pittier earned her bachelor’s degree at Occidental College before pursuing her medical degree at Trinity College and completing an...

Dr. Wendy Gao

Dr. Gao joined the medical staff in 2015. A graduate of Queen’s University in Kingston, Ontario, she obtained her medical...

Dr. Brent Tinnel

Dr. Brent Tinnel is a board certified Radiation Oncologist who is excited to join Tacoma Valley Radiation Oncology Centers at...

Dr. Robyn Vera

Dr. Robyn Vera is a native of the Pacific Northwest. She completed a Bachelor of the Arts and a Bachelor...

Dr. Mohammad Hissourou

Dr. Mohammad Hissourou III earned his Bachelor Degree from Columbia University and completed one year in consulting, as part of...

To reach a physician for urgent needs after business hours, please call (253) 272-1077. The answering service will take your call and contact the physician on call.