Dr. Yung is a licensed Internal Medicine in CA. Medical degree obtained from UT Health San Antonio. Completed residency training at LAC+USC Medical Center. Currently practices at Johntin Medical Group (Johntin Medical Group), located at 1722 Desire Ave, Rowland Heights, CA 91748. Dr. Yung specializes in internal medicine and primary care.. In addition to English, Dr. Yung speaks Mandarin and Cantonese.