Scott J. Belsley, MD, FACS


Dr. Scott J. Belsley

Dr. Scott Belsley
Scott J. Belsley, MD, FACS is board certified by the American Board of Surgery and has over fourteen years of experience performing weight-loss surgery including the laparoscopic gastric bypass and the laparoscopic sleeve. His clinical practice also includes complex hernias, reflux surgery and operations on the intestines ranging from the esophagus to the colon

Clinical Profile

After completing his general surgical residency at St. Luke’s-Roosevelt Hospital Center, Dr. Scott Belsley completed concurrent fellowships in robotic surgery as well as advanced laparoscopy and bariatric surgery. Over the last fourteen years, his clinical practice has evolved to concentrate on both sub-specialties. One common denominator in these two sub-specialties is that they involve the intestinal foregut. Dr. Belsley has become a recognized expert in the surgical treatment of diseases of the gastroesophageal junction and the esophagus.

Dr. Belsley has developed a personalized practice in bariatric surgery with excellent technical and social outcomes. Dr. Belsley is an independently certified member of American Society of Metabolic and Bariatric Surgery and performs his bariatric surgical procedures at the Mount Sinai Morningside, a Center of Excellence for Bariatric Surgery. Dr. Belsley crafted a personalized approach and program for patients that includes orientation sessions, nutritional counseling and support groups—many of which he moderates personally in both English and Spanish.

In addition to his clinical research projects, Dr. Belsley has pioneered new surgical techniques and applications for robotic surgery. He routinely collaborates with oncological surgeons to expand the use of minimally invasive robotic surgery, with and without the additional of new facilitating technologies. He continues to be involved in the development of cutting edge advances in minimally invasive surgery to expand current treatment practice and improve patient safety profiles for high risk procedures.

An important overriding theme in all his work—clinical and academic—is that of collaboration. Dr. Belsley regularly works closely with colleagues in medicine and in other academic specialties to advance patient care. Being part of an institution such as the Mount Sinai Health System facilitates the spirit of collaboration that is so important to his work and enhances the quality of care he and his colleagues can offer patients in the system.

Research Profile

For the last fourteen years, Dr. Belsley has served as a staff attending surgeon at Mount Sinai Morningside and Mount Sinai West, his research and clinical interests have focused on minimally invasive laparoscopic and robotic surgery. The research component has included the study of patient risk factors and minimally invasive surgical outcomes in the field of bariatric surgery, the identification and quantification of metrics in the education and evaluation of robotic surgical training, and the evaluation of best practices in the application of new surgical technologies.

Dr. Belsley developed a novel approach to addressing these questions by partnering with mathematicians and computer scientists. In doing so, he could apply mathematical modeling systems—commonly used in non-medical arenas such as flight-path analysis—to evaluate various aspects of surgical training. He used known movement metrics in individuals with Parkinson's disease to analyze surgical dexterity in the context of robotic surgery learning. Ultimately, this branch of his work resulted in collaboration between Intuitive Surgical® and Columbia University, which allowing access to and facilitated analysis of the Da Vinci® robot’s Advance Programming Interface (API).

Dr. Belsley further applied mathematical modeling platforms to a variety of minimally invasive clinical projects, including identifying familial patterns in the incidence of abdominal aortic aneurysms and risk factors predictive of surgical outcomes and best practices in bariatric surgery. His work in robotics allowed clinical evaluations of hybrid interventional and cardiothoracic robotic approaches as well as new robotic techniques addressing surgical pathology in the intestinal foregut. His minimally invasive interests also included analyses of natural orifice endoscopic transluminal surgery (NOTES) and endoscopic stenting.

Dr. Belsley has a parallel interest in medical device development and his work in that arena resulted in his developing an instrument for transluminal surgery. For this, he was awarded two United States patents in 2010 and 2013.

As a clinical surgeon, Dr. Belsley was privileged to be part of the team that performed the world’s first robotic sympathetic nerve reconstruction using intercostal nerve autografts and microsurgical minimally invasive techniques. This novel approach to the treatment of compensatory hyperhidrosis following thoracic sympathectomy for palmar hyperhidrosis was developed and perfected as an Institutional Animal Care and Use Committee approved animal model at Mount Sinai Morningside and later evolved into an Institutional Review Board approved clinical trial at Mount Sinai West. Dr. Belsley has presented his work in pioneering robotic and minimally invasive surgical techniques at both national and international meetings and have published over one hundred peer-reviewed abstracts, papers and book chapters.


Collaboration with Ksenija Belsley, MD, FACS


The Doctors Belsley

Dr. Scott Belsley and Dr. Ksenija Belsley
Scott J. Belsley, MD, FACS and Ksenija Belsley, MD, FACS have been operating together since the previous millennia. They continue to collaborate in many clinical scenarios to best serve their patients.


As part of a commitment to providing the best medical outcomes for his patients, Dr. Belsley has developed a network of medical specialists with whom he consults and collaborates on a regular basis.


One of his closest partnerships is with his wife, Dr. Ksenija Belsley. She is a dedicated plastic surgeon, a Fellow of the American College of Surgery and is board certified from both the American Board of Plastic Surgery and the American Board of Surgery.


Working together allows Drs. Scott and Ksenija Belsley to simultaneously manage general surgical procedures with plastic and reconstructive surgeries. Their strong partnership offers clear benefits to their clients allowing them to consolidate extensive medical experience as well their extended network of medical specialists. The doctors’ individual talents, combined with their genuine passion for surgery translates into a coordinated approach to optimizing patient care.