Dr. Charissa H. So is an internist in Sylmar, California and is affiliated with Olive View-UCLA Medical Center. She received her medical degree from University of California, Irvine, School of Medicine and has been in practice for more than 20 years. Dr. Charissa H. So has expertise in treating asthma, among other conditions - see all areas of expertise. Dr. Charissa H. So accepts Medicare - see other insurance plans accepted.