Chang, Yang MD, Ph.D.Attending, Medical Director and Clinical Assistant ProfessorInternal Medicine Hospital Medicine Education: Zhejiang, Zhejiang University School of MedicineMain Office:630-968-8220 Edward-Elmhurst Health 155 E. Brush Hill Rd #MC 5000 Elmhurst, IL 60126 Clinic Intersts:hospital medicine(inpatient services).Certification: Board Certified in Internal Medicine Ph.D.: Peking Union Medical College