Dr. Thomas S. Lam is a gastroenterologist in Alhambra, California and is affiliated with multiple hospitals in the area, including Alhambra Hospital Medical Center and Garfield Medical Center. He received his medical degree from American University of the Caribbean School of Medicine and has been in practice for more than 20 years. Dr. Thomas S. Lam has expertise in treating colonoscopy, upper gi endoscopy, among other conditions - see all areas of expertise. Dr. Thomas S. Lam accepts Medicare, Aetna, Humana, Blue Cross - see other insurance plans accepted.