Quest Diagnostics Incorporated provides diagnostic testing information services in the United States and internationally. The company operates in two businesses, Diagnostic Information Services and Diagnostic Solutions. The Diagnostic Information Services business offers clinical testing services, including routine testing, gene-based and esoteric testing, anatomic pathology services, and drugs-of-abuse testing, as well as related services and insights. The Diagnostic Solutions business provides risk assessment services for the life insurance industry; clinical testing services for new drugs, vaccines, and medical devices; and clinical connectivity and data management solutions for healthcare organizations and clinicians to improve patient care and medical practice, as well as develops, manufactures, and markets diagnostics products. Its products include HemoCue, a point-of-care testing product for hemoglobin, glucose, microalbumin, and white blood cell testing; Care360 HER that allows doctors to electronically create, manage, and distribute patient encounter notes; and ChartMaxx, an electronic document management system for hospitals. The company offers its services to patients, physicians, hospitals, integrated delivery networks, health plans, employers, governmental institutions, and other commercial clinical laboratories through a network of laboratories and patient service centers. Quest Diagnostics Incorporated was founded in 1967 and is headquartered in Madison, New Jersey.

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