100 Casa Street, Suite C
San Luis Obispo, California 93405

Phone: (805) 541-1932
Fax: (805) 541-1653

Dr. Jonathan Stella and Dr. Robert Johnson lead the qualified and compassionate team of cancer care professionals at San Luis Obispo Radiation Oncology Center.


The San Luis Radiation Oncology treatment team offers a full range of advanced treatment options, including Intensity-Modulated Radiation Therapy (IMRT), Image-Guided Radiation Therapy (IGRT), and 3D Radiation Treatment Planning. Dr. Stella and Dr. Johnson are active in Radiation Oncology treatment research and education, leading outreach efforts and cancer prevention initiatives in the San Luis Obispo community.

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After completing an internal medicine internship at the East Tennessee State University College of Medicine, Dr. Stella pursued an oncology residency at the University of Miami, Jackson Hospital and a radiation oncology residency at the West Coast Cancer Foundation in San Francisco. His training included rotations through UCSF, Stanford University, and Lawrence Berkeley Lab...




Dr. Johnson graduated from the University of California, Los Angeles with a B.S. in Biology. He obtained his M.D. from the University of Cincinnati College of Medicine. He completed his residency training in Radiation Oncology at the University of Louisville, serving as chef resident in his final year. At the University of Louisville, Dr. Johnson gained comprehensive training in general radiation oncology.