Dr. Bruce Greenfield was born in Winnipeg, Canada, and moved to Los Angeles as a child. He attended UCSD as an undergraduate and Albert Einstein College of Medicine for medical school. Before beginning his internship in internal medicine, he was the recipient of the International Health Fellowship, which provided him with the opportunity to practice medicine in the rural village of Black River, Jamaica. He completed both his residency in Internal Medicine and his fellowship in Nephrology at Baylor College of Medicine in Houston, Texas. He has been in private practice since 1986 and has also held various professional and academic positions such as Chief of Staff at California Hospital Medical Center and Clinical Instructor for the David Geffen School of Medicine at UCLA. Dr. Greenfield is the Founding Partner of Premier Nephrology Medical Group.