Quest Diagnostics Incorporated is a leading provider of diagnostic testing, information, and services to patients, physicians, and other healthcare providers. Founded in 1967 by Paul Brown as Metropolitan Pathology Laboratory, Inc., the company changed its name to Quest Diagnostics in 1997. Headquartered in Secaucus, New Jersey, United States, Quest Diagnostics operates a vast network of laboratories, patient service centers, and clinical testing facilities across the United States and internationally.