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Southern Arizona Center for Minimally Invasive Surgery logo
Patrick Chiasson
MD, FACS, FRCSC
Bringing surgical expertise, innovation, and cutting edge techniques to Tucson since 2001.Learn More

About Dr. Chiasson

Dr. Chiasson is a board certified and fellowship trained Minimally Invasive Surgeon. He has expertise in advanced laparoscopic, endoscopic, and robotic procedures. His surgical practice is characterized by managing complex surgical diseases of the GI tract. Dr. Chiasson is recognized both in the Tucson, Arizona community and internationally for his surgical treatment of obesity. He performs all of the established primary and revision weight loss surgical procedures including the Vertical Sleeve Gastrectomy, Gastric Bypass, Duodenal Switch, and Adjustable Gastric Band. He serves as an educational consultant for Ethicon Endosurgery teaching surgeons from around the country to perform the sleeve operation. He is the past president of the Arizona chapter of the American Society for Metabolic and Bariatric Surgery. Currently, Dr. Chiasson is serving as the Bariatric Medical Director of Carondelet St. Mary’s Hospital. In addition, Dr. Chiasson is well known for his Minimally Invasive Surgical management of non-cancerous and cancerous conditions of the esophagus, stomach, colon, and rectum. He has long been acknowledged for his early adoption of both new techniques and technology in the surgical treatment of these diseases. As such, he has been the first surgeon in Southern Arizona to perform many new procedures such has laparoscopic/thoracoscopic esophagectomy, transanal endoscopic microsurgery, laparoscopic duodenal switch, etc. More recently, this has been highlighted by Dr. Chiasson being the first surgeon in Arizona to utilize the Transenterix “Spider” surgical system allowing him to safely perform single-incision procedures.
(Dr. Chiasson’s) bedside manner is impeccable and he has an uncanny way of making you feel like you’re the MOST IMPORTANT person in the world to him; that he would do anything for you he possibly could…Dr. Chiasson is the BEST doctor I’ve ever had the privilege of knowing. He removed my gallbladder a year after my weight loss surgery and I entrusted him with my life twice…I am at goal now…He literally gave me back my life! Both his surgical competence and bedside manner are SUPER.”  Maggie F.