
Dr. Mattar is Professor and Chief in the Division of Bariatric and Metabolic Surgery at Baylor College of Medicine. Formerly, he was the Medical Director of Swedish Weight Loss Services in Seattle, WA, and prior to that, he was a Professor of Surgery at Oregon Health & Science University. He is also the Past President of the American Society of Metabolic and Bariatric Surgeons and the President of the Fellowship Council. His practice is entirely bariatric in nature and his main clinical interests are in the area of standardizing pathways and optimizing patient outcomes. He has published numerous articles and book chapters in the field and he enjoys teaching and advocating for his patients.
Selected publications from PubMed
Robotic-Assisted vs Laparoscopic Bariatric Surgery and 30-Day Serious Adverse Events: A National MBSAQIP Analysis.
Dallal RM, Eid GM, Neff M, Cottam DF, Mattar SG
J Am Coll Surg. 2026 Jun 24 doi: 10.1097/XCS.0000000000002049.
Demand Shock Exposes Surgical Training Problem: What Bariatric Volume Collapse Reveals About the Future of Minimally Invasive Surgery Fellowship Training.
Dallal RM, Mattar SG
J Am Coll Surg. 2026 Jun 19 doi: 10.1097/XCS.0000000000002071.
Obesity pillars roundtable: Better together - combined obesity medicine and metabolic surgery care for the treatment of obesity.
Frederiksen K, Berger-Fleishman RA, Jad A, Mattar SG, Shetye B
Obes Pillars. 2026 Mar;17:100232 doi: 10.1016/j.obpill.2025.100232.
First modified Delphi consensus statement on robotic-assisted da Vinci sleeve gastrectomy.
El Chaar M, Rogers AM, Mattar SG, Kukreja SS, Jenkins M, Askew C, Hassan M, Baker R, Smith E, Galvani C
Surg Obes Relat Dis. 2024 Nov;20(11):1163-1171 doi: 10.1016/j.soard.2024.04.452.
Mesenteric fat cryolipolysis attenuates insulin resistance in the Ossabaw swine model of the metabolic syndrome.
Mazor R, Babkin A, Littrup PJ, Alloush M, Sturek M, Byrd JP, Hernandez E, Bays H, Grunvald E, Mattar SG
Surg Obes Relat Dis. 2023 Apr;19(4):374-383 doi: 10.1016/j.soard.2022.10.023.
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