Welcome to Radiant Physician Group

About Us


Radiant Physician Group is a rapidly growing company, specializing in Urgent Care clinical services including staffing, recruiting, and quality oversight. Our headquarters are located in the heart of Orange County. Radiant Physician Group works closely with Hoag Hospital in Newport Beach and Sharp Community Medical Group in San Diego.

Dr. Robert Amster, founder of Radiant Physician Group, has been a board certified Emergency Physician and Occupational Medicine Physician for over 30 years. Dr. Amster designed Radiant Physician Group to be an innovative clinical services company in Southern California. A leader in providing quality medical care by physicians to Urgent Cares in Southern California.

“The practice of medicine has proven to be an infinitely gratifying job,” explains Dr. Amster. “Every single time our physicians can help another human being feel better, it gives us a good feeling in return.”