Dr. Sean C. Lai is a gastroenterologist in Santa Monica, California and is affiliated with multiple hospitals in the area, including Providence Saint John's Health Center and Cedars-Sinai Medical Center. He received his medical degree from Washington University in St. Louis School of Medicine and has been in practice for more than 20 years. Dr. Sean C. Lai has expertise in treating colonoscopy, upper gi endoscopy, among other conditions - see all areas of expertise. Dr. Sean C. Lai accepts Medicare, Aetna, Blue Cross, United Healthcare - see other insurance plans accepted.