Calculate your BMI (Body Mass Index)

Depending on your healthcare plan, your personal doctor, and your individual health circumstances, you might be a good candidate for weight-loss surgery if you have a BMI over 35-40+

Body Mass Index Chart

Meet our Bariatric Surgeons

Dr. Brian T. Chin

Bariatric Surgeon

Dr. Brian Chin practices advanced laparoscopic, bariatric, and general surgery at BASS Medical Group’s Walnut Creek and Brentwood offices. Dr. Chin is an expert in advanced minimally invasive surgery, including robot-assisted surgery. Dr. Chin has special expertise in the treatment of: Morbid obesity (laparoscopic sleeve gastrectomy, laparoscopic Roux-en-Y gastric bypass, laparoscopic adjustable band placement, and revisional bariatric surgery) Abdominal wall hernias (laparoscopic inguinal, incisional, and ventral hernia repair) Hiatal hernias and paraesophageal hernias Benign and malignant conditions of the upper gastrointestinal tract, including gastroesophageal reflux disease (laparoscopic Nissen fundoplication), achalasia (laparoscopic Heller myotomy), and benign and malignant stomach tumors Gallbladder disease (laparoscopic cholecystectomy) Benign and malignant solid organ disease (laparoscopic splenectomy, adrenalectomy, and pancreatectomy) Benign and malignant conditions of the colon and rectum, such as diverticulitis, colon cancer, and rectal cancer (laparoscopic colectomy) Venous disease (varicose veins, venous insufficiency, and venous stasis wounds) Dr. Brian Chin was born and raised in the Bay Area. After graduating from Acalanes High School in Lafayette he ventured cross-country to coastal Maine, where he graduated magna cum laude from Bowdoin College with a bachelor’s degree in physics and mathematics. From there, he went on to earn a master’s degree in applied physics from Columbia University. He earned his medical degree at the University of Michigan Medical School, then returned to California for his surgery residency at the University of California at San Diego, where he won the Department of Medicine’s Halasz Award for surgical consultation and the Department of Surgery’s Chairman’s Prize for teaching and service excellence. Additionally, he served as administrative chief resident. Following residency, Dr. Chin completed a fellowship in bariatric and advanced laparoscopic surgery at the University of California at San Francisco, working alongside world-renowned leaders at the forefront of laparoscopic surgery. Dr. Brian Chin is board certified in surgery by the American Board of Surgery and in advanced trauma life support by the American College of Surgeons. Dr. Chin also serves as a trauma surgeon at the John Muir Medical Center, which is certified as a level II trauma center by the American College of Surgeons and is Contra Costa County’s only trauma center. He sees patients in Walnut Creek and Brentwood.

Dr. Jason F. Moy

Bariatric Surgeon

Dr. Jason Moy is a graduate of the University of Michigan, where he earned both his undergraduate degree from the Honors College and Master of Public Health degree in molecular epidemiology from the School of Public Health. Dr. Moy received his medical degree from Michigan State University. Following medical school, he completed a surgical residency at William Beaumont Hospital. There, in addition to surgical training, Dr. Moy was extensively involved in surgical research and had the opportunity to both publish peer-reviewed articles and present at national and international surgical meetings. After completing residency, Dr. Moy continued his surgical training in New York City as a fellow in minimal access and bariatric surgery in a joint program with Cornell Medical College and Columbia University at New York Presbyterian Hospital. In New York, Dr. Moy trained with pioneers in laparoscopic and bariatric surgery, Drs. Michel Gagner, Alfons Pomp and Dennis Fowler. He also continued surgical research, publishing multiple times, including a paper on laparoscopic sleeve gastrectomy technique. At Columbia, Dr. Moy was appointed clinical instructor of surgery. Dr. Moy is an advanced laparoscopic surgeon, practicing the full scope of general surgery, bariatric surgery and trauma surgery. Dr. Moy has a particular interest in single incision laparoscopic surgery and performed one of the first single site laparoscopic cholecystectomies in Northern California. Dr. Moy also treats varicose veins. Dr. Moy is board certified by the American Board of Surgery and is a fellow of the American College of Surgeons. He is currently the division chief of general and vascular surgery at the John Muir Medical Center in Concord.

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