Dr. Robert S. Fan is a gastroenterologist in Los Angeles, California. He received his medical degree from Medical College of Ohio and has been in practice for more than 20 years. Dr. Robert S. Fan has expertise in treating colonoscopy, upper gi endoscopy, inflammatory bowel disease (ibd), among other conditions - see all areas of expertise. Dr. Robert S. Fan accepts Medicare, Aetna, Humana, Blue Cross - see other insurance plans accepted.