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Our Team

FMC's Bariatric Surgical Weight Loss Center team includes physicians and staff from Flagstaff Surgical Associates working closely with FMC staff for the operation of the program. The team takes a multidisciplinary approach and includes surgeons, general practioners, nurse educators, psychologists, dietitians, physical and occupational therapists and exercise specialists.

 Surgeons and Providers

Robert Berger, M.D., general surgeon, graduated from the University of Arizona (UofA) College of Medicine. Dr. Berger performed an internship and residency at the UofA, and completed a fellowship in minimally invasive surgery at the University of Illinois, Chicago. He is a member of the American College of Surgeons, the Society of the American Gastroenterologic Surgeons and the American Society of Bariatric Surgeons. Dr. Berger has performed more than 500 bariatric surgery cases.



Andrew Aldridge, M.D., general surgeon, graduated from the University of Arizona (UofA) College of Medicine. Dr. Aldridge performed an internship and residency at the UofA and has participated in a multitude of training sessions at other bariatric surgery institutions. He is a member of the American Medical Association, Arizona Medical Association and the Society of American Gastrointestinal Endoscopic Surgeons. Dr. Aldridge has performed more than 250 bariatric surgery cases.



Julie Polzin, N.P.-C, earned a Bachelor of Science in nursing from the University of Florida, Gainesville. She earned a Family Nurse Practitioner Master of Science in nursing at Northern Arizona University, where she was a Graduate with Distinction. Polzin is board certified by the American Association of Nurse Practitioners.

John B. Martin, Ph.D., earned his bachelor’s degree in psychology from
Dartmouth College in Hanover, N.H.; his Ph.D. in clinical psychology from McGill University in Montréal, Province of Quebec, Canada. Dr. Martin is a member of the American College of Healthcare Executives and an affiliate member of the American Society of Metabolic and Bariatric Surgery.
Sumner Sydeman, Ph. D., graduated for the University of South Florida with a doctoral degree in clinical psychology and completed clinical internship and fellowship training at The University of Florida.  He joined the Bariatric Program in 2009 and conducts pre-surgery psychological evaluations and facilitates the Bariatric Support Group.  Dr. Sydeman is a licensed psychologist and an associate member of the American Society of Metabolic and Bariatric Surgery.



Nutrition, Exercise and Psychological Counseling
We have built our program on a model of comprehensive care for the patient before surgery, while in the hospital and after surgery. All patients are required to have psychological testing and nutritional counseling prior to surgery. Prior to surgery, patients receive a comprehensive educational notebook and education from nursing, dietitians and an exercise professional. Follow-up appointments with the psychologist and dietitian are available as needed.

Pool Program
An exercise program in our warm-water therapy pool is available for a fee for patients both pre-op and post-op. Call Therapy Services at 928-773-2125 to set up an appointment.



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