Randall Medical Building 1710 N. Randall Road, Suite 200, Elgin, IL 60123  847/214-5740   map Family Practice Joseph Chung, M.D. Shital Tanna, M.D. Laura DeMarco-Paitl, D.O. Pediatrics Marlyn Valena, M.D. Internal Medicine Udaya Bontu, M.D. Michael Hernandez, M.D. Ronald Hirsch, M.D. Patricia Merlo, D.O. ©2010 Signature Medical Associates. All Rights Reserved.