Bariatric Surgery

The mission of The Obesity Society’s Bariatric Surgery Section is to advance the science of bariatric surgery and the clinical management of the bariatric surgery patient utilizing a multidisciplinary approach.



  • Content development and organization of a “Bariatric Day” of Symposia for TOS 2011
  • Obesity Week 2013 Combined Symposia Development—the above stated goal is a preliminary step toward this longer-term project
  • Increased use of electronic resources such as: website bulletin board, list-serv, and links to our department's web-based journal club
  • Continue to build content of our newsletter with relevant information for our membership
  • Develop and distribute information regarding ongoing studies involving bariatric surgery with biannual updates
  • Develop an electronic bariatric surgery journal club


November 2012 Newsletter

September 2012 Newsletter

April 2012 Newsletter

January 2012 Newsletter

September 2011 Newsletter

April 2011 Newsletter

February 2011 Newsletter

July 2010 Newsletter

April 2010 Newsletter

March 2010 Newsletter


Join the Bariatric Surgery Section

All section members must be a member of The Obesity Society. 

If you are not a member of The Obesity Society, join today.  Be certain to select the Bariatric Surgery Section when completing your profile.

If you are already a member and would like to join the Bariatric Surgery Section please login to your member profile and select the Bariatric Section. Once you have updated your profile, you will receive all communications pertaining to the section.

Please contact Shameeka Green, This e-mail address is being protected from spambots. You need JavaScript enabled to view it , Volunteer Coordinator if you have any questions. 


Bariatric Surgery ListServ

Section Listservs are now available for TOS members! Listservs are a great place to find and to share knowledge and ideas. Sign up Today!

How To Sign Up for a ListServ

Member Listserv Rules & Etiquette






Lee Kaplan, MD, PhD (Chair, 2013-2014)

Massachusetts General Hospital, Wellesley, MAlee kaplan 

Lee Kaplan, MD, attended medical school at Yeshiva University Albert Einstein College of Medicine and graduated in 1981. He underwent additional gastroenterology and internal medicine training at Massachusetts General Hospital.



Leslie Heinberg, PhD (Chair Elect, 2013-2014)

Cleveland Clinic, Cleveland, OH

Leslie Heinberg, PhD, is a Clinical Psychologist and Director of Behavioral Services for the Bariatric and Metabolic Institute at the Cleveland Clinic. She is also an Associate Professor of Medicine in the Cleveland Clinic Lerner College of Medicine of Case Western Reserve University. She has been a member of TOS since 2005. Her research and clinical interests include psychosocial aspects of bariatric surgery and weight loss outcomes, eating disorders and disorders of body image.


Samer G. Mattar, MD (Secretary/Treasurer 2013-2015)Mattar.jpg

Oregon Health & Science University

Samer G. Mattar, M.D, is Professor of Surgery, and he is the Chief of Bariatric Services at OHSU. Dr. Mattar's areas of interest include the optimization of outcomes of weight loss surgery, including the improvement, or cure, relevant comorbidities; bariatric surgery in adolescents; the treatment of patients with relapsed weight gain and high-risk bariatric patients. He also has an interest in the laparoscopic treatment of gastroesophageal reflux disease and other diseases of the foregut and the endoscopic diagnosis and treatment of foregut diseases. His areas of research include bariatric surgery outcomes, metabolic pathophysiology and surgical education. Dr. Mattar has held leadership positions at ASMBS and SAGES, and has been a member of TOS since 2003. 

Adrienne Youdim, MD (Past Chair)

Cedars Sinai Medical Center , Los Angeles, CA

Adrienne Youdim, MD is the Medical Director of Center for Weight Loss at Cedars Sinai Medical Center and Co-Director of the Weight Loss, Center of Excellence. She is also the Assistant Clinical Professor of Medicine at UCLA David Geffen School of Medicine. Her background is in internal medicine and is certified as a physician nutrition specialist. Her areas of interest include implementation of standardized best practices for the pre- and post- operative care of the bariatric patient and in providing resident education in the area of obesity. Dr. Youdim has been a member of TOS since 2005.

Denise E. Wilfley, PhD (Council Liaison 2011-2014)

Washington University School of Medicine, St. Louis, MO

Denise WilfreyCROPPED

Denise Wilfley is a Professor of Psychiatry, Medicine, Pediatrics, and Psychology at Washington University in St. Louis, and also serves as Director of the Weight Management and Eating Disorders Program at Washington University School of Medicine. Dr. Wilfley is a TOS fellow, and has been a member of TOS since 1998 and a member of the Pediatric Obesity Section since 2000. She currently is a member of The Obesity Society Scientific Review Committee and previously served on the editorial board of Obesity. Dr. Wilfley’s vision for TOS Pediatric Obesity Section includes increasing the scope and support of the Section and bringing a greater focus on the dissemination and implementation of evidence-based interventions to “real world” clinical practice. Her research program focuses on the etiology, prevention, and treatment of obesity and eating disorders in youth, and her work been influential in developing innovative and cost-effective methods for early intervention and prevention of obesity and eating disorders.

(Please note: External Links are provided as a courtesy. The Obesity Society is not responsible for the content on sites accessed through external links.)

clinician directory


obesity links

OW web logo

OW On Demand