Udaya Bontu, M.D. Specialty: Internal Medicine Joseph K. Chung, M.D. Specialty: Family Medicine Laura DeMarco-Paitl, D.O. Specialty: Family Medicine Michael Hernandez, M.D. Specialty: Internal Medicine Ronald L. Hirsch, M.D. Specialty: Internal Medicine Patricia K. Merlo, D.O. Specialty: Internal Medicine Shital Tanna, M.D. Specialty: Family Medicine Marlyn Valena, M.D. Specialty: Pediatrics      ©2010 Signature Medical Associates. All Rights Reserved.