Quest Diagnostics, a registered trademark of Quest Diagnostics Incorporated, is one of the world s leading providers of clinical testing solutions and abuse testing drugs. It offers diagnostic testing services to U.S. patients and physicians through a nationwide network of laboratories and more than 2,000 company-owned service centers. With a staff of over 900 employees, the public company provides gene-based and esoteric testing and anatomic pathology solutions. Quest Diagnostics is also one of the leading providers of risk assessment services for the life insurance industry. Its diagnostics products business manufactures and markets specialized point-of-care testing equipment and test kits. The company serves health care organizations and clinicians with information technology solutions. Quest Diagnostics esoteric laboratories offer reference testing services to physicians, academic medical centers and hospitals. Its laboratories specialize in the field of hematology, oncology, toxicology, serology, immunology, and endocrinology and metabolism. The company operates NID, a test kit manufacturing subsidiary. Quest Diagnostics maintains nearly 75 locations in the United States and Canada.