oller Weight Loss & Advanced Surgery features the only group of fellowship-trained bariatric and advanced general laparoscopic surgeons in Arkansas. Joshua Roller, MD, Yong Kwon, MD, Josh Mourot, MD, and Jaime Dutton, MD offer the most sophisticated modern weight loss surgery (bariatric surgery) techniques available, including roux-en-Y gastric bypass, lap gastric banding or LAP-BAND surgery, and sleeve gastrectomy, to help you take control of your weight and reclaim your health. We serve patients in Northwest Arkansas and Tulsa, Oklahoma. They also perform other minimally invasive procedures, including many that can ease or resolve medical problems associated with obesity.