Our Expert Team
Our bariatric surgeons and weight loss experts in Los Angeles and Orange County, specialize in the many areas of metabolic and weight management: bariatric medicine, nutrition, exercise, clinical psychology, and laparoscopic surgery. We understand that weight loss is complex; to help you lose weight, we address the many factors that caused you to gain weight. Each of our team members is available for one-on-one appointments in our office and group education through our LifeStyle Management Program.
Brian B. Quebbemann, MD, FACS has lived and practiced surgery in Orange County, California since 1997. As a nationally respected expert in bariatric surgery, his practice focuses entirely on laparoscopic weight-loss surgery. 
Justin D. Braverman, MD, FACS moved to Orange County, California from Chicago, Illinois to join The N.E.W. Program and dedicate his career in the discipline of bariatric surgery.
Tracy A. Siegfried, M.D. is a specialist in internal medicine with extensive experience in bariatric medicine. After earning degrees in biology and child psychology from the University of Minnesota...
Karen Garner, MD, a board certified internal medicine specialist, joined The N.E.W. Program to focus her practice on bariatric surgery in June 2004. She previously had spent five years...
Nikita Tihonov, MD, who has extensive laparoscopic and bariatric surgical training, joined The N.E.W. Program’s surgical team in 2011 and works closely with Brian Quebbemann, M.D. and Justin Braverman, M.D. 
John Jolliffe, MFT is currently Director of Clinical Programs for The N.E.W. Lifestyle Management Program. He is a Diplomat of The American Psychotherapy Association..
Amanda Sensabaugh, RD joined The N.E.W. Program with two years of experience working in clinical dietetics. Prior to joining the multidisciplinary team at N.E.W., she practiced clinical nutrition at Riverside Community Hospital.
Nick Moran, Fitness Trainer has over 25 years of training experience. His conditioning program consists of a hypertensive, scientifically backed regiment that utilizes the latest techniques...
Shawna Murphy, Fitness Trainer is a former Fitness Manager who has been training athletes, running boot camps, and coaching both healthy weight and overweight patients for over 8 years.