Wael Dimassi, MD

Clinical Assistant Professor

Dr. Dimassi is an experienced surgeon specializing in Bariatric, Laparoscopic, and Robotic surgery, with a particular emphasis on upper GI and Bariatric procedures especially SADI (Single Anastomosis Duodenal Switch) . He received his training at prestigious institutions such as the University of Montreal and the American University of Beirut, equipping him with a breadth of international expertise. In his career, he has served in significant roles including Program Director at Makassed General Hospital and as a consultant at various esteemed hospitals. Additionally, he has contributed to medical education as a lecturer at the Lebanese American University, Alfaisal University and Beirut Arab University. As a Fellow of the American College of Surgery and a member of key medical societies such as the American Society for Metabolic and Bariatric Surgery (ASMBS) and the International Federation for the Surgery of Obesity and Metabolic Disorders (IFSO), Dr. Dimassi’s research in surgery and his contributions to medical literature demonstrate a profound commitment to advancing the field. Dr. Dimassi’s approach is grounded in excellence and compassionate healthcare, while he also plays a vital role in mentoring the next generation of surgeons.

Selected Publications

  1. Long-term follow-up of a cohort with post sleeve gastrectomy leaks: results of endoscopic treatment and salvage surgery. Surgical endoscopy, 2023.
  2. The short-term outcomes of one anastomosis gastric bypass as primary or revision surgery. ASMBS, 2023.
  3. Laparoscopic enteropexy for the treatment of jejunojejunal intussuception following laparoscopic Roux-en-Y Gastric Bypass, Surgical endoscopy, 2023.
  4. The outcome of bariatric surgery in patients more than 65 years old. ASMBS, 2023.
  5. Laparoscopic enteropexy for the treatment of jejunojejunal intussusception following laparoscopic Roux-En-Y gastric bypass SAGES, 2023.
  6. Single Anastomosis Duodeno-Ileal bypass (SADIs) as primary or revisional surgery: midterm outcomes of a single Canadian bariatric center. IFSO, 2022.

Professional and Research Interests

Education and Training

Professional Organizations, Memberships, Affiliations, and/or Honors



Bariatric, Minimally Invasive Surgery, Weight loss, Metabolic improvement, Upper and Lower GI Surgeries, Hernia Repair