18575 E. Gale Ave., Suite #108
City of Industry, CA 91748
Tel: 323-724-8780
Fax: 323-728-9936

John P. Thropay, M.D.


Founder, Medical Director, and President

Beverly Oncology & Imaging (BOI) Medical Group, Inc.


Co-Founder, Medical Director

Radiation Oncology Stereotactic Radiosurgery

Rotating Gamma Knife Institute of Orange County

Anaheim, California

As Founder, Medical Director, and President of Beverly Oncology and Imaging (BOI) Medical Group, Dr. John P. Thropay’s mission is to provide the best possible outcomes for cancer patients. His commitment to excellence is his medical team’s unparalleled innovation in clinical skill, turnkey technology applications, and professional management.

Dr. Thropay opened his first radiation oncology center, in 1980. Since then he has expanded the operation to seven outpatient clinics throughout Southern California and two additional facilities internationally (Dominican Republic and Los Mochis, Mexico). He has earned distinction as the first freestanding outpatient clinic network to be JCAHO-certified, thereby earning the same distinction for its safety guidelines and protocols as other major and prestigious medical institutions. Through these ventures, his mission has remained the same: To provide the highest-quality cancer treatment care through a comprehensive set of wellness programs and support groups for his patients and their families and for the region’s multicultural population, by building a professional team of multicultural and multi-linguistic physicians, nurses and staff.

Dr. Thropay, a medical visionary and highly respected researcher in the war against cancer, along with his medical team, are renowned experts due translational research experience, having brought breadth of new and emerging technologies to the community. These technologies include IMRT (Intensity Modulated Radiation therapy) and was the first to install this technology in Los Angeles County; Brachytherapy, including the most recent electronic brachytherapy, the popular implant technology practiced by an elite group of Radiation Oncologists, and Hyperthermia, the unique heat treatment used in conjunction with Radiation Therapy in special cases to reduce recurrence of certain cancers.

Building upon his treatment expertise and his passion for scientific research, Dr. Thropay established Clinical Trials & Research Associates (CTRA) to develop some of the world’s latest breakthroughs to treat cancer in 1999. He and his professional team became one of California’s full-time, free-standing and privately owned investigative site authorized to conduct phase II-IV clinical research protocols. CTRA consists of a well-qualified research staff that is highly trained to conduct outpatient research studies according to GCP (Good Clinical Practice) guidelines, FDA (Food and Drug Administration) and Sponsor regulations.

Due to Dr. Thropay’s extensive experience both as a physician and as a patient advocate he was invited to serve as a member of the University of California at Los Angeles (UCLA) Institutional Review Board for Oncology Trials where he shares insights regarding care to the large and diverse oncology population of the Greater Los Angeles Area. He also serves on the Advisory Board at University of California at Irvine (UCI) for the Clinical Trials, Medical Device and Drug Development Committee.

Dr. Thropay graduated from UCLA with a degree in Medicine and completed his residency in Radiation Oncology at LAC/USC Medical Center. He is distinguished and respected by his peers within the oncology profession, and is an active member in numerous organizations, including, The Tumor Board, American College of Radiation Oncology, American Medical Association, Los Angeles Radiological Association and the Association of Clinical Research Professionals.