Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments with related expertise Bariatric Center in Jacksonville Bariatric Surgery Program in Rochester Endocrinology Gastroenterology and Hepatology General Internal Medicine General Surgery in Phoenix Metabolic and Abdominal Wall Reconstructive Surgery in Rochester Psychiatry and Psychology Surgery Areas that research this procedure Psychiatry and Psychology Research Doctors who perform this procedure Edit search filters close Narrow your search By location Phoenix/Scottsdale, AZ By last name There are no doctors whose last name begins with the letter A A Find a doctor whose last name begins with the letter B B There are no doctors whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D Find a doctor whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F Find a doctor whose last name begins with the letter G G There are no doctors whose last name begins with the letter H H There are no doctors whose last name begins with the letter I I There are no doctors whose last name begins with the letter J J There are no doctors whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L active Find a doctor whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N There are no doctors whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R There are no doctors whose last name begins with the letter S S There are no doctors whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U Find a doctor whose last name begins with the letter V V There are no doctors whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-1 out of 1 doctors available Last Name Initial: M James A. Madura, II, M.D. General Surgeon Phoenix, AZ Areas of focus: Bariatric surgery, Laparoscopic surgery, Hernia repair, Minimally invasive surgery, Gastric bypass surgery, Gastroesoph...ageal reflux disease, Hernia Show more areas of focus for James A. Madura, II, M.D. ResearchMayo Clinic researchers are investigating advanced and minimally invasive treatment options for weight-loss surgery. PublicationsSee a list of publications about gastric bypass surgery by Mayo Clinic doctors on PubMed, a service of the National Library of Medicine. Research Profiles Edit search filters close Narrow your search By location Arizona Florida Minnesota View all View all physicians • All Locations DiBaise, John K. M.D. Arizona Harold, Kristi L. M.D. Arizona Lanpher, Brendan C. M.D. Minnesota Que, Florencia G. M.D. Minnesota Reisenauer, Janani S. M.D. Minnesota By Mayo Clinic Staff Gastric bypass (Roux-en-Y) care at Mayo Clinic Request an appointment AboutCare at Mayo Clinic Nov. 25, 2025 PrintShow references Lim RB. Bariatric procedures for the management of severe obesity: Descriptions. https://www.uptodate.com/contents/search. Accessed Jan. 16, 2025. Weight loss (metabolic and bariatric surgery). National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/weight-management/bariatric-surgery. Accessed Jan. 14, 2025. Bariatric surgery procedures. American Society for Metabolic and Bariatric Surgery. https://asmbs.org/patients/bariatric-surgery-procedures. Accessed Jan. 14, 2025. Kellerman RD, et al. Obesity in adults. In: Conn's Current Therapy 2025. Elsevier; 2025. https://www.clinicalkey.com. Accessed Jan. 14, 2025. Walls RM, et al., eds. The morbidly obese patient. In: Rosen's Emergency Medicine: Concepts and Clinical Practice. 10th ed. Elsevier; 2023. https://www.clinicalkey.com. Accessed Jan. 14, 2025. Comparison of sleeve gastrectomy vs Roux-en-Y gastric bypass: A randomized clinical trial. JAMA Network Open. 2024; doi:10.1001/jamanetworkopen.2023.53141. Bariatric surgery. Endocrine Society. https://www.endocrine.org/patient-engagement/endocrine-library/bariatric-surgery. Accessed Jan. 14, 2025. Health Education & Content Services. Bariatric surgery. Mayo Clinic; 2024. Nimmagadda R. Allscripts EPSi. Mayo Clinic. Dec. 3, 2024. Related Biliopancreatic diversion with duodenal switch BMI and waist circumference calculator Bone health: Tips to keep your bones healthy Diabetes Gastric Bypass Complications Gastric bypass diet: What to eat after the surgery Gastric bypass surgery Gastric Bypass Surgery: One Patient's Journey Guide to types of weight-loss surgery Obesity Type 2 diabetes Weight Loss Surgery Options Weight-loss surgery: Is it an option for you? Show more related content News from Mayo Clinic Beyond weight loss: Bariatric surgery may reduce cancer risk Once a bariatric surgery patient, nurse now inspires others Why exercise is essential after bariatric surgery Losing weight as a couple Study finds long-term health benefits from bariatric surgery and liver transplant Show more news from Mayo Clinic Products & Services A Book: The Mayo Clinic Diet Bundle Gastric bypass (Roux-en-Y)AboutDoctors&DepartmentsCare atMayoClinic PRC-20308092 Tests & Procedures Gastric bypass (Roux-en-Y)