Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

James Michael Mason, MD

Individual provider Radiation Oncology Physician · NPI 1902955818

James Michael Mason, MD is a Radiation Oncology in Wildomar, California. Graduated from Wayne State University School of Medicine in 1988, 38 years ago. Practices with City of Hope Medical Foundation, a 959-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
38
Trained at
Wayne State University School of Medicine
Licensed in
CA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

36450 Inland Valley Dr
Wildomar, CA 92595-9583
Phone: (951) 696-0679
Fax: (951) 696-9748
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 6939 Palm Ct, Riverside, CA 92506-2815 — (951) 683-6771

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence G85713 (CA)

Record details

NPI number1902955818
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 9, 2007
Last updated in NPPESNovember 13, 2020
Certification dateNovember 13, 2020
Mailing addressPo Box 512185, Los Angeles, CA 90051-0185

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1988 (38 years in practice)
Group practice City Of Hope Medical Foundation — 959 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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