You are here: Home Emergency Department at Valley Medical Center Care Providers Emergency Department at Valley Medical Center Care Providers Page Content Brian D. Johnston M.D., M.P.H. Brian Johnston, M.D., M.P.H., is chief of Pediatrics at Harborview Medical Center. Dr. Johnston is interested in clinic and community partnerships to… Specialties and Expertise: Pediatrics Read more Andrew McCoy M.D., M.S. Specialties and Expertise: Emergency Medicine Read more Currently not seeing new patients. Publishing Page Content MoreFind more information on the Emergency Department at Valley Medical Center.