Our Providers

FortisBMI Weight Loss Surgeon Dr. Sina Matin

Sina Matin, MD, FACS, FASMBS

Dr. Matin is highly experienced in bariatric surgery, revisional bariatric surgery, and minimally invasive techniques such as advanced laparoscopic and robotic surgery.

He’s active in the American Society of Bariatric and Metabolic Surgery, Texas Association for Bariatric Surgery and the Clinical Robotic Surgery Association.

Dr. Matin operates at and serves in bariatric clinical leadership roles at hospitals affiliated with Baylor Scott and White Health, Texas Health Resources, Medical City Healthcare, Methodist Health System, and other independent local hospitals.

And while his accolades and clinical skills are very impressive, he is down to earth with his patients. They immediately feel comfortable and confident with him and in their surgical outcomes, even before they enter the operating room.

 ​You can also learn more about Dr. Matin’s work at Surgical Group of North Texas.

FortisBMI Weight Loss Surgeon Dr. Julio Rivera

Julio Rivera, MD, FACS

Dr. Rivera has been a practicing physician since 2001 and has helped patients on their weight loss journey for over a decade. He brings extensive training and experience in minimally invasive bariatric surgery, advanced laparoscopic abdominal procedures such as robotic bariatric surgery, and an unsurpassed commitment to patient care.

Dr. Julio Rivera is Board Certified by the American Board of Surgery, is a Fellow of the American College of Surgeons, and is a Fellow of the American Society for Metabolic & Bariatric Surgery. Patients rave about Dr. Rivera’s ability to explain complex procedures and make the process of weight loss as pleasant as possible. Dr. Rivera also speaks fluent Spanish, making the journey less complex for our Spanish-speaking patients.

You can also learn more about Dr. Rivera’s work at Surgical Group of North Texas.

Shahid Shafi, MD, FACS, CEO

Dr. Shafi helps patients on their weight loss and healthy lifestyle journey, specifically focusing on the non-surgical side. He enjoys teaching patients about Obesity as a chronic disease and how to put exercise and healthy eating choices into their everyday life. For him personally, this includes bicycling running, walking, and portion control. Dr. Shafi doesn’t like to deny people the food they love – by helping patients discover a sustainable balance of exercise and healthy meal planning.

A lifelong learner, Dr. Shafi’s education has included Southern Methodist University in Dallas, University of Pennsylvania, the Johns Hopkins University, and University of Medicine and Dentistry of New Jersey. Dr. Shafi has been a practicing surgeon since 1998. He is board certified in General Surgery and a Fellow of the American College of Surgeons.

You can also learn more about Dr. Shafi’s work at Surgical Group of North Texas.


Susan is dual board certified in family practice and acute care. She has spent 30 years working in various healthcare settings, including family practice, cardiology, cardiovascular surgery and intensive care. The most gratifying practice has been helping patients treat the disease of obesity. “It is incredible to have the opportunity to  help patients improve their quality of life, reduce their medications, improve weight-related medical problems and simply feel better!” Susan lives in Flower Mound with her husband and son. In her spare time she enjoys being active outdoors, traveling  and spending time with family & friends.