Quest Diagnostics Inc. (DGX) Stock Rating & Analysis

Quest Diagnostics is a leading independent US provider of diagnostic testing, information, and services. More than 97% of revenue comes from clinical testing, anatomic pathology, esoteric testing, and substance abuse testing, with specimens collected through a national network of roughly 2,400 patient service centers as well as many doctors' offices and hospitals. A much smaller diagnostic solutions segment offers clinical trials testing, risk-assessment services, and information technology solutions.