Houston Methodist. Leading Medicine.
Houston Methodist. Leading Medicine

Weight Management Center

Our Experts

Our Bariatric Surgeons

Vadim Sherman, MD
Vadim Sherman, M.D., FACS, FRCSC
Medical Director, Bariatric and Metabolic Surgery

Dr. Vadim Sherman is a Board Certified General Surgeon. He is also a Fellow of the American College of Surgeons and a Fellow of the Royal College of Surgeons of Canada.
His undergraduate studies were in Honors Physiology at the University of Alberta. He then went on to complete medical school at the University of Western Ontario. Dr. Sherman performed his General Surgery training at McGill University. During his training, he also earned a Master of Science from McGill University. He then completed a one year fellowship in Advanced Minimally Invasive and Bariatric Surgery at the Cleveland Clinic.
Dr. Sherman is actively involved in a number of surgical societies including the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), American Society for Metabolic and Bariatric Surgery (ASMBS) and the American College of Surgeons (ACS). He has trained medical students, surgical residents, fellows and surgeons in advanced minimally invasive and bariatric techniques. He has authored a number of peer-reviewed articles, book chapters and surgical videos. He has also lectured nationally and internationally on the topic of surgical weight management. His research interests are in bariatric surgery, surgical education and advanced minimally invasive surgical outcomes.
Dr. Sherman's clinical expertise is minimally invasive gastro-intestinal surgery, with the primary focus being bariatric surgery. As well, he performs surgery for reflux disease, hernia repair and other intestinal diseases.
Dr. Sherman is committed to providing patients with comprehensive care and advanced surgical solutions at the highest standard of excellence.


Patrick R. Reardon, MD
Patrick R. Reardon, M.D., FACS
Bariatric/Advanced Minimally Invasive General Surgeon
Clinical Professor of Surgery, Weill Cornell Medical College
Houston Methodist Hospital Department of Surgery
Chief, Section of Minimally Invasive Surgery
Chief, Section of Foregut Surgery
Surgical Director, Houston Methodist Hospital Reflux Center
Program Director, Houston Methodist Hospital Advanced Minimally Invasive and Bariatric Surgery Training Program

Dr. Pat Reardon did his undergraduate training at Texas A&M University. He attended Baylor College of Medicine for his medical school, general surgery, and cardiothoracic surgery training under Dr. Michael E. DeBakey. He is a Fellow of the American College of Surgeons, a member of The Society of American Gastrointestinal Endoscopic Surgeons (SAGES), and the Society for Surgery of the Alimentary Tract (SSAT).
Dr. Reardon has been training residents and fellows in advanced laparoscopic surgical techniques for many years. He was a founding member of The Minimally Invasive Surgery Fellowship Council and is on the Executive Committee of its successor organization, The Fellowship Council. The Fellowship Council has over 90 fellowship program members across the country. Dr. Reardon is currently the Director of The Methodist Hospital Advanced Minimally Invasive Surgery Training Program and Surgical Director of The Methodist Hospital Reflux Center.
Dr. Pat Reardon has authored or co-authored over 40 peer-reviewed articles, three book chapters, including the chapter on "Surgical Treatment of Morbid Obesity" in Sabiston's Textbook of Surgery, 16th Edition, and won awards for his presentations at national and international meetings. His training and educational videos are in the libraries of the American College of Surgeons and The Society of American Gastrointestinal Endoscopic Surgeons.
Dr. Reardon performs first time laparoscopic roux-en-Y gastric bypass for the treatment of morbid obesity and revisional laparoscopic roux-en-Y gastric bypass for the treatment of complications of previous bariatric operations, such as the vertical banded gastroplasty or VBG.


Dexter Turnquest, MD
Dexter Turnquest, M.D.
Minimally Invasive General and Bariatric Surgeon
Medical Director, Bariatric and Metabolic Surgery, Houston Methodist Willowbrook Hospital

Dr. Dexter Turnquest is a board certified general and bariatric surgeon who has practiced in the Northwest Houston area for more than 15 years. He takes a personal interest in each of his patients and offers a well-rounded weight loss program that is designed to be informative and supportive for patients as they transition to a healthier way of life. Dr. Turnquest addresses both psychological issues and nutritional challenges with his patients to help them achieve long-term weight loss success. He has performed more than 1,000 bariatric surgeries, including Roux-en-Y gastric bypass, sleeve gastrectomy, adjustable gastric banding (LAP-BAND®), and revisional bariatric procedures. Dr. Turnquest is frequently a guest speaker during physician continuing medical education events. His clinical expertise also includes minimally invasive procedures, such as gallbladder, hernia repair, diseases of the breast, and colon, anti-reflux and pancreatic surgeries.

Dr. Turnquest is known for his dedication to his patients and is often the physician of choice for other doctors. In addition to being featured in Newsweek, he has been recognized numerous times by his peers in the Texas Monthly magazine “Super Doctors” issue, and selected as one of the top doctors in Houston by H Magazine, Houstonia Magazine and Health & Fitness Sports Magazine.

Dr. Turnquest is actively involved in the Texas Medical Association and Harris County Medical Society, and is a consulting faculty member with Ethicon Endosurgery. He is a past board member of the Houston Academy of Medicine, and founding member of Houston Bariatric Society.

Dr. Turnquest attended medical school at the University of South Florida College of Medicine, and completed his fellowship and residency at The University of Texas Health Science Center at Houston where he was chief resident. He is board certified (1996) and recertified (2006) by the American Board of Surgery, and is a Fellow of the American College of Surgeons and American Society for Metabolic & Bariatric Surgery.


Nabil Tariq, MD
Nabil Tariq, M.D.
Minimally Invasive and Bariatric Surgery, Surgical Critical Care, Department of Surgery Methodist Hospital

Dr. Nabil Tariq completed his surgical residency at William Beaumont Hospital in Michigan in 2008 and is a board certified surgeon. Dr Tariq went on to complete advanced training in surgical critical care at the University of Pennsylvania in Philadelphia in 2009 and became board certified in critical care. He proceeded to complete further advanced training in minimally invasive surgery, bariatric surgery and endoscopy at the world-renowned Cleveland Clinic in Cleveland, Ohio in 2010. Dr. Tariq is a member of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), the American Society for Metabolic and Bariatric Surgery (ASMBS), the American College of Surgeons (ACS) and the Society of Critical Care Medicine (SCCM). Dr. Tariq specializes in bariatric surgery (Lap Band, laparoscopic sleeve gastrectomy and laparoscopic Roux Y gastric bypass), surgery for reflux disease, advanced hernia surgeries and other minimally invasive abdominal surgeries. He has co-authored several medical chapters and peer-reviewed articles, and currently is teaching surgical residents and fellows at The Methodist Hospital. Dr. Tariq strongly believes in a multidisciplinary approach to bariatric surgery and is committed to provide excellence in patient care with dedication and humility.


Lee M. Morris, MD
Lee M. Morris, M.D., FACS
Bariatric Surgeon

Dr. Lee M. Morris attended the University of Alabama where he graduated with honors from the College of Engineering with a B.S. in Chemical Engineering. He attained his medical doctorate from the Medical College of Georgia in Augusta, GA. He completed his general surgery residency at the Louisiana State University Health Sciences Center in New Orleans, LA, where in his five years of training he was twice named "Resident of the Year" and four times awarded the highest board examination score. In addition, he completed a two-year research fellowship at the Cincinnati Children's Hospital Medical Center in Cincinnati, OH, where he investigated the effects of diabetes on wound healing. After finishing his general surgery residency and research fellowship, Dr. Morris completed a fellowship in advanced minimally invasive and bariatric surgery at The Methodist Hospital in Houston, TX, where he was asked to stay on as an Assistant Professor in the Department of Surgery.
Dr. Morris is a board certified general surgeon and a member of the Society of American Gastrointestinal Endoscopic Surgeons (SAGES), the American Society for Metabolic and Bariatric Surgery (ASMBS), the Society for Surgery of the Alimentary Tract (SSAT) and the American College of Surgeons (ACS). Dr. Morris has authored or co-authored several peer reviewed articles and presented his research at many national and international conferences.
In addition to minimally invasive general surgery, Dr. Morris has a special interest in the management of obesity. Dr. Morris believes in a comprehensive approach to weight loss, including lifestyle modifications, nutrition education as well as surgical options such as laparoscopic Roux Y gastric bypass, laparoscopic sleeve gastrectomy and laparoscopic adjustable gastric banding (Lap Band).


Todd A. Worley, MD

Todd A. Worley, M.D., FACS
Minimally Invasive General/Bariatric Surgeon
Dr. Todd Worley did his undergraduate training at Texas A&M University. He attended medical school at UT Health Science Center in San Antonio, and completed his residency at St. Joseph Hospital in Chicago. He also completed a Minimally Invasive and Robotic Surgery Fellowship at UT Health Science Center in Houston, where he was a clinical instructor.
In addition to bariatric surgery and robotic surgery, Dr. Worley specializes in advanced minimally invasive general surgery, surgical treatment of GERD, hernia surgery, gallbladder surgery, small and large intestine surgery, and surgical endoscopy. He is a fellow of the American College of Surgeons, and a member of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), the Clinical Robotics and Surgical Association, the Society for Surgery of the Alimentary Tract, and the Society of Laparoendoscopic Surgeons.


Brian Mirza, MD, FACS

Brian Mirza, M.D., FACS
Bariatric Surgeon/Minimally Invasive Surgeon
Dr. Mirza is a regular member of the ASMBS, American Society of Metabolic and Bariatric Surgery and has been in practice for over 15 years. He is certified by the American Board of Surgery, a fellow of the American College of Surgeons, member of the Society of American Gastro-intestinal and Endoscopic Surgeons (SAGES), the Society of Laparo-endoscopic Surgeons (SLS), and a bariatric surgeon with formal fellowship training in minimally invasive surgery and laparoscopic bariatric surgery.
Dr. Mirza served as the director of minimally invasive surgery and surgical endoscopy at Saint Elizabeth Health Center from 2005-2007, and currently is the president and medical director of Bariatric Care Centers, PA.
He received his advanced fellowship training in laparo-endoscopic and laparoscopic Bariatric surgery at the world-renowned Cleveland Clinic Foundation, in Cleveland, Ohio. He has authored and co-authored many scientific articles and book chapters on minimally invasive surgery, and the new incision-less surgical procedures currently in development and known as NOTES surgery.
Dr. Mirza specializes in laparoscopic & weight-loss surgery: laparoscopic gastric bypass/RNY, the adjustable gastric banding surgery, also known as the Lap-Band system, sleeve and revisional surgeries. He has successfully performed thousands of those procedures, including many advanced laparoscopic procedures.


Ziad Amr, MD

Ziad Amr, M.D.
Bariatric Surgeon
Dr. Ziad Amr went to the University of Jordan Medical School, and graduated in the top 10% of his class. He completed his general surgery residency training from 2002-2007 at The Methodist Hospital at the Texas Medical Center in Houston, Texas. While in training, Dr. Amr gained extensive experience in general surgery procedures. His colleagues awarded him intern of the year in 2002 and resident of the year in 2005 in residency. He was the administrative chief resident in 2007. Dr. Amr is certified in general surgery by the American Board of Surgery and is a member of the Society of the American Gastrointestinal Endoscopic Surgeons (SAGES).
After his residency, he completed a one-year fellowship in Advanced Minimally Invasive Surgery at the Methodist Hospital in the Texas Medical Center in Houston, Texas. During his fellowship, Dr. Amr trained with local and national leaders in bariatric surgery and gained wide experience in multidisciplinary surgical approach for bariatric patients that required laparoscopic gastric bypass, Lap Band, and laparoscopic gastric sleeve surgery.
Dr. Amr is trained in laparoscopic foregut and bariatric (weight loss) surgery. His interests include laparoscopic surgical treatment of gastroesophageal reflux disease, treatment of inguinal and incisional hernias, and gallbladder disease.


Garth Davis, MD
Garth Davis, M.D., FACS
Bariatric Surgeon

Dr. Garth Davis graduated Phi Beta Kappa from the University of Texas in Austin. He attended medical school at Baylor College of Medicine and graduated with high honors.
Dr. Davis completed his surgical residency at the University of Michigan in Ann Arbor. While in Michigan, he gained extensive experience in general surgical disciplines. He is certified by the American Board of Surgery and is an Assistant Clinical Professor of Surgery at Baylor College of Medicine. He is a Fellow of the American College of Surgeons and a member of the American Society for Bariatric Surgery. Dr. Davis has earned credits from many post-graduate courses including laparoscopic and bariatric surgery and has trained with national leaders in weight loss surgery.
Dr. Davis has had extensive training in laparoscopic surgery and has studied the creation of a full-service, integrated weight loss center. He has specialized in bariatric surgery and now performs laparoscopic adjustable banding.


Robert Davis, MD
Robert Davis, M.D., FACS
Bariatric Surgeon

Dr. Robert Davis specializes in laparoscopic bariatric and general surgery. He and his son, Dr. Garth Davis, have performed over 2,500 bariatric procedures since 2002, and their expertise in the field of bariatric medicine is world-renowned.
Born in South Africa, Dr. Davis attended the University of the Witwatersrand, Johannesburg, South Africa, and graduated in 1963. He pursued his post-graduate education in London and Edinburgh in Great Britain, New York, Galveston and Houston, and was certified by the American Board of Surgery in 1973 and re-certified in 1987, 1997, and 2007. In addition, Dr. Davis has written many scientific papers and made presentations at numerous scientific and medical meetings. He is a member of numerous medical and surgical societies, and has been awarded certificates by the American Medical Association for continuing education.
Dr. Davis is a past Associate Clinical Professor of Surgery at Baylor College of Medicine and is Past-Deputy Chief of the Department of Surgery at The Methodist Hospital in Houston, Texas. He is a Fellow of the American College of Surgeons (FACS), and the Royal College of Surgeons (RCS), and is a member in good standing of the American Society for Metabolic and Bariatric Surgery (ASMBS) and the International Federal for the Surgery of Obesity (IFSO).