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About Our Bariatrics Team

The Bariatric and Metabolic Institute offers a multidisciplinary team approach to weight loss. We believe that a strong support system is vital for successful weight loss and continuing good health.

Santiago Horgan

Santiago Horgan, MD
Director, Bariatric and Metabolic Institute

Dr. Santiago Horgan is a leading bariatric surgeon in the field of minimally invasive surgery and was among the first surgeons to be trained in the use of the Lap-Band adjustable gastric banding system. As director of the Bariatric and Metabolic Institute, he has performed more than 1,000 Lap-Band procedures and instructs other surgeons in the Lap-Band and Realize Band techniques throughout the United States. In addition, Dr. Horgan performs other weight-loss surgeries including gastric sleeve, gastric bypass and gastric plication.

Eduardo Grunvald

Eduardo Grunvald, MD
Internist, Director of UC San Diego Weight Management Program

Dr. Grunvald is the internist for the UC San Diego Bariatric and Metabolic Institute and medical director of its Weight Management Program. He is integrally involved with managing patients undergoing surgical and nonsurgical weight loss efforts. Dr. Grunvald is responsible for assessing bariatric surgery patients before surgery and evaluating co-morbidities that may exist. Dr. Grunvald also coordinates care with primary care providers and assists patients with post-operative medication adjustments and medical follow-up.

Garth Jacobsen

Garth Jacobsen, MD

Dr. Garth Jacobsen attended medical school at the University of Washington and received his surgical training at the University of Illinois, Chicago. He then completed a minimally invasive and bariatric surgery fellowship at UC San Diego. A specialist in gastric banding, he was closely involved with the FDA trials for the approval of the Lap-Band system.

William Perry, MD

William Perry, PhD

Dr. Perry is the associate director of Neuropsychiatry and Behavioral Medicine and the chief supervising psychologist at UC San Diego Health System. He is internationally recognized as an expert in assessment and has worked extensively in the psychological assessment of candidates for bariatric procedures. He is the senior member of the psychology team and an integral member of the Bariatric and Metabolic Institute.

Bryan Sandler, MD

Bryan Sandler, MD

Dr. Bryan Sandler is fellowship-trained in minimally invasive and robotic surgery, and has additional specialized training in the surgical treatment of obesity. He is also active in the rapidly advancing field of natural orifice surgery. He treats patients who require general surgery for disorders of the foregut, esophagus, gastric or biliary system and small intestine. He also performs surgeries of the hindgut for colon and rectal disorders.

  • Mary Kirk, CNP - Nurse Manager
    Mary is a certified nurse practitioner. Her responsibilities at the Bariatric and Metabolic Institute include program planning, development and quality assurance, patient evaluations and follow-up (including diabetes management and medication adjustment), surgery-related presentations and assisting with general surgery.
  • Jill Fisher, MS, RD – Registered Dietitian
    Jill is the BMI dietitian and works with patients to help them through the pre-op and post-op phases of diet and meal planning, as well as providing tips for healthy eating to maximize patients' success.
  • Natalie Cook - Patient Advocate
    Natalie received the Lap-Band in 2003, lost 100 pounds and has successfully kept the weight off. As the patient advocate for BMI, she helps educate patients about the entire weight loss surgery process. She is passionate about helping patients understand every step as they embark on this life-changing experience and is committed to providing ongoing support after the procedure.
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