MEDNAX, Inc. (MEDNAX) is a provider of physician services, including newborn, maternal-fetal, pediatric subspecialties and anesthesia care. As of December 31, 2011, its national network consisted of 1,839 affiliated physicians, including 996 physicians who provided neonatal clinical care, in 34 states and Puerto Rico. It has 190 affiliated physicians who provide maternal-fetal care to expectant mothers experiencing complicated pregnancies and obstetrical hospitalist services in many areas where its affiliated neonatal physicians practice. In May 2014, it acquired Cross River Anesthesiologist Services, P.C. and Anesthesia and Pain Management Group, LLC. In July 2014, it acquired Associated Anesthesiologists of Joliet, S.C. and its related entities: Madison Avenue Anesthesia Placement Services, LLC, Crawford Avenue Anesthesia Placement Services, LLC and Pain Centers of Chicago, LLC.