Vivian H. Chou, M.D. 282 W Loop Rd, Wheaton, IL60189 Vivian H. Chou, M.D., has been practicing medicine since 2002, and is part of an experienced team of allergy, asthma and…More immunology specialists at Oakbrook Allergists in Wheaton. Chou conducted her fellowship at Rush University Medical Hospital in Chicago. At Oakbrook Allergists, they provide service for allergies, asthma, immunology and treatments. Also, at Oakbrook specialized medical doctors not only service patients one-on-one, but work as a team to effectively diagnose and treat each individual.