Quest Diagnostics Incorporated is a provider of diagnostic testing information services. The Company consists of two businesses: Diagnostic Information Services and Diagnostic Solutions. Diagnostic Information Services business, consists of two parts, develops and delivers diagnostic testing, information and services to patients, physicians, health plans, hospitals, accountable care organizations (ACOs), integrated delivery networks (IDNs), other commercial laboratories, patients and other customers. Diagnostics Information Services business also provides diagnostic information services, which includes providing clinical testing services, such as routine testing, gene-based and esoteric testing, anatomic pathology services and drugs-of-abuse testing. Diagnostic Solutions includes the Company’s other businesses, including central laboratory testing for pharmaceutical and medical device clinical trials, risk assessment services, diagnostic products and healthcare information technology.