James Mason, M.D., M.P.H.

951-696-0679
James Mason, M.D., M.P.H.
Radiation Oncologist
Clinical Expertise
  • HDR Brachytherapy
  • LDR Brachytherapy
  • Intensity Modulated Radiation Therapy
  • Prostate Brachytherapy
  • Stereotactic Radiosurgery
  • 3D Conformal Radiation Therapy
  • Mammosite
Academic Appointments
  • Assistant Clinical Professor, Department of Radiation Oncology
Clinical Teams
Radiation Oncology

James Mason, M.D., M.P.H., brings a wide variety of radiation oncology expertise to City of Hope. With more than 25 years' experience, he is highly trained and well-versed in the latest precision radiation equipment and techniques including HDR brachytherapy, LDR brachytherapy, intensity modulated radiation therapy, prostate brachytherapy, stereotactic radiosurgery, 3D conformal radiation therapy and the Mammosite system.

Dr. Mason received his medical degree from Wayne State University in Detroit where he also completed his internship and residency. He also holds a Masters in Public Health from Harvard.

Dr. Mason served at the prestigious Cleveland Clinic for several years before arriving in Southern California. He's spent the past decade treating patients in Wildomar in Riverside County.

Location

Education & Experience

Degrees

  • 2004, M.P.H. Quantitative Methods, Harvard School of Public Health, Boston, MA
  • 1988, M.D., Wayne State University, Detroit, MI
  • 1984, B.S., Wayne State University, Detroit, MI

Residency

  • 1993, Resident, Radiation Oncology, Wayne State University, Detroit, MI

Internship

  • 1990, Intern, Internal Medicine, Wayne State University, Detroit, MI

Professional Experience

  • 2018–present, Radiation Oncologist and Assistant Clinical Professor, Department of Radiation Oncology, City of Hope | Wildomar Radiation Oncology, Wildomar, CA
  • 2007–2018, Radiation Oncologist, Vantage Radiation Oncology Center, Wildomar, CA
  • 2007–2008, Radiation Oncologist, Vantage Radiation Oncology Center at Redhawk, Temecula, CA
  • 2002–2006, Staff Radiation Oncologist, Cleveland Clinic Health System, Fairview Hospital Moll Cancer Center, Cleveland, OH
  • 2000–2006, Associate Staff, Radiation Oncology, Cleveland Clinic Foundation, Cleveland, OH
  • 2000–2006, Staff Radiation Oncologist, Cleveland Clinic Health System, Hillcrest Hospital Radiation Oncology Department, Mayfield Heights, OH
  • 1993–2000, Medical Director, Radiation Oncology, Drs. Hill and Thomas, Mt. Sinai Hospital Beechwood Integrated Medical Center, Cleveland, OH

Awards & Memberships

Memberships

  • American Medical Association
  • American Society of Therapeutic Radiologists & Oncologists
  • American College of Radiology
  • Ohio State Medical Associates

Publications

  • Newman L, Mason J, Cote D, Vin Y. African-American Ethnicity, Socioeconomic Status, and Breast Cancer Survival, Cancer. 2002;94:2844-2854.

Ratings & Reviews

Ratings and reviews below are gathered from the Press Ganey Clinician and Group Consumer Assessment of Healthcare Providers and Systems (CG CAHPS) survey. CG CAHPS is a standardized survey that is used to measure a patient's experience in the physician office setting. Ratings are an average of all responses to questions about a provider's care, with five stars being the highest.
5.0
Recommend this provider office
5.0
Provider explain in way you understand
5.0
Provider listen carefully to you
5.0
Show respect for what you say
5.0
Spend enough time with you
4.9
Know important info medical history
4.9
Rate provider 0-10
04/17/26
If it is definitely a very good clinic they do a good job - Verified patient
04/17/26
Dr Mason is very good at explaining the problem in detail and how to fix the disease - Verified patient
04/16/26
It was a very positive experience in every respect. Beautiful facility and really professional staff - Verified patient
04/16/26
Dr. Mason's obvious expertise put me at ease and he took extra time to clearly explain my upcoming treatment plan. He was exceedingly kind, compassionate and knowledgeable about my specific case. - Verified patient
04/15/26
The staff that's there and those who have gone they're all respectful to each other and they make me feel like family - Verified patient