Riverside Radiation Therapy Center

Together: A Better Way To Fight Cancer

Riverside Radiation Therapy Center is part of The US Oncology Network, which has more than 1,400 affiliated physicians with expertise in medical oncology, hematology, radiation oncology, gynecologic oncology, urology, oncology surgery and other specialties at more than 400 sites of care in 26 states, treating over 1.1 million patients annually. The Network provides strong and comprehensive practice management capabilities and value-based care expertise that are critical for practices navigating today’s challenging healthcare landscape. The Network is supported by McKesson Specialty Health, an industry leader in solutions that empower the community patient care delivery system to advance the science, technology and quality of care.

We treat cancer by creating an environment of wellness surrounding the patient with exceptional medical professionals, vast clinical expertise, and technical resources. We become part of every community we serve and work with other organizations to bring awareness and education to those affected by cancer.



  • Address

6939 Palm Court
Riverside, CA 92506

  • Contact Information

P: (951) 683-6771
F: (951) 683-7450


Janet Hocko, MD

Janet Hocko, MD joined Valley Radiotherapy Associates Medical Group in December, 2006 and is the Medical Director in Riverside. Dr. Hocko is board certified in Radiation Oncology. She earned her Doctor of Medicine degree at the University of California Irvine. She completed her residency and internship at Loma Linda University Medical Center and was an Assistant Professor there for many years.

Dr. Hocko’s treatment specialties include brachytherapy for gynecological malignancies. She has a special interest in radiation therapy for breast, gastrointestinal, and lung malignancies.

Medical School: UC Irvine
Internship: Loma Linda University
Residency: Loma Linda University

Board Certification: 

The American Board of Radiology


Riverside County Medical Society
ASTRO - American Society for Therapeutic Radiology and Oncology
American Medical Association
Los Angeles Radiological Society

Susanna R. Gordon, MD

Dr. Gordon is a Board Certified Radiation Oncologist specializing in the treatment of gastrointestinal malignancies with a sub-specialty in hepatobiliary tumors; thoracic malignancies, soft tissue sarcomas, and lymphomas. She has extensive experience in the treatment of squamous and basal cell carcinomas of the skin and ocular (uveal) melanomas. Dr. Gordon is highly trained in several modalities of radiation therapy including Intensity Modulated Radiation Therapy (IMRT), Stereotactic Body Radiation Therapy (SBRT) and Low Dose Rate (LDR) Brachytherapy for hepatobiliary tumors. Prior to joining Riverside Radiation Therapy Center, Dr. Gordon held positions as Medical Director in Radiation Oncology at St. Mary's Medical Center in Jefferson City, MO.

As a medical student at the University of California, Los Angeles (UCLA) David Geffen School of Medicine, Dr. Gordon had the unique opportunity of working with highly respected instructors and clinicians. As a resident and Chief Resident in Radiation Oncology at UCLA, she was mentored by some of the most distinguished Radiation Oncologists in the country and internationally.

Medical School: University of California, Los Angeles School of Medicine
Residency: Department of Radiation Oncology of the University of California, Los Angeles School of Medicine

Board Certification: 

The American Board of Radiology


ASTRO - American Society for Radiation Oncology
Los Angeles Radiological Society / Southern California Radiation Oncology Society
AWWR - American Association for Women Radiologists



  • 3D Conformal Radiation Oncology
  • 3D Ultrasound Imaging
  • CT Scanning & Simulation
  • Electron Beam Therapy
  • External Beam Radiation Therapy
  • Image-Guided Radiation Therapy (IGRT)
  • Intensity-Modulated Radiation Therapy (IMRT)





Click here to download our new patient checklist.



The patient portal allows patients to manage their personal health information electronically at their own convenience.

Click here to access the patient portal.