Quest Diagnostics Incorporated is a provider of diagnostic testing, information and services. The Company offers United States patients and physicians access to diagnostic testing services through its nationwide network of laboratories and Company-owned patient service centers. The Company provides clinical testing, including gene-based and other esoteric testing, anatomic pathology services, including dermatopathology and testing for drugs-of-abuse, and risk assessment services for the life insurance industry. It also provides testing for clinical trials. Its diagnostics products business manufactures and markets the United States Food and Drug Administration (FDA) cleared or approved diagnostic test kits and specialized point-of-care testing.