Healthcare: Weight Loss and Metabolic Center

Meet Our Team: Bariatric Surgery


Experts at the Weight Loss and Metabolic Center at Baylor St. Luke’s Medical Center specialize in bariatric (weight loss) surgery and surgical treatment of metabolic diseases. Our highly experienced team consists of nationally-recognized bariatric surgeons, gastroenterologists, nurses, clinical health psychologists and registered dieticians. We are committed to helping our patients achieve long-term weight loss success and improved health by eliminating life threatening obesity-related conditions, like diabetes and hypertension.

We believe a collaborative, multidisciplinary approach is crucial to ensuring the best possible care, outcome and long-term weight loss for bariatric patients. We work closely with a variety of specialties from across Baylor Medicine.


Juliet Holder-Haynes, M.D.

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Dr. Juliet Holder-Haynes is a member of the Weight Loss and Metabolic Center at Baylor Medicine. Dr. Holder-Haynes specializes in bariatric and minimally invasive general surgery. Dr. Holder-Haynes has advanced training and skills in laparoscopic surgery of the stomach, small intestine, and colon. She is committed to providing personalized care to all of her patients.

Wasif M. Abidi, M.D., Ph.D.

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Dr. Wasif Abidi completed gastroenterology, bariatric endoscopy, and advanced endoscopy fellowships at Brigham and Women’s Hospital of Harvard Medical School in Boston. While there, Dr. Abidi gained unique experience in endoscopic primary weight loss procedures and treatment of complications of bariatric surgery. He has participated in numerous studies and clinical trials in novel treatments of obesity and diabetes. Dr. Abidi has experience in a variety of gastrointestinal diseases and offers both basic and interventional endoscopic procedures.

Peter Jian, M.D.

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Dr Jian is a bariatric physician who specializes in medical weight loss. He offers a non-surgical weight loss track for patients who are not surgical or endoscopic candidates, which includes a personalized diet plan, weight loss medications, behavioral support, and physical activity counseling. Dr Jian also provides clinical consultations for patients who are trying to decide between surgery, endoscopic treatment, and non-surgical options. Additionally, he provides preoperative and postoperative medical evaluations for patients who do not have a primary care physician. Dr Jian obtained his medical degree and residency training from Baylor College of Medicine. After residency, he obtained additional formal training and certification in medical weight loss and became a Diplomate of the American Board of Obesity Medicine.

S Julie-Ann Lloyd, M.D., Ph.D.

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As a specialist in Minimally Invasive, Robotic, and Bariatric Surgery, Dr. Lloyd utilizes state-of-the-art techniques to treat obesity-related diseases and employs a comprehensive, multi-disciplinary care plan for her patients. In addition to her clinical responsibilities, Dr. Lloyd is a dedicated researcher and educator. Her research interests include understanding the pathophysiology of obesity and improving patient outcomes through optimization of perioperative care.