University of Iowa Roy J. and Lucille A. Carver College of Medicine Diagnostic Laboratories (UIDL) Department of Pathology 200 Hawkins Drive 5231 Roy J. Carver Pavilion (RCP) Iowa City, IA 52242-1087. Toll-free: 1-866-844-2522 Local: 1-319-384-7212 Client Services Fax: 319-384-7213 Billing Phone: 1-319-353-7958 Billing Fax: 319-356-0729.