Quest Diagnostics Incorporated (NYSE: DGX) Quest Diagnostics Incorporated: The world's leader in diagnostic testing, information, services, blood tests, and lab tests. IR: Quest Diagnostics Company Overview GF: Quest Diagnostics Incorporated: NYSEGX quotes & news - Google Finance YF: DGX: Summary for Quest Diagnostics Incorporated - Yahoo! Finance SA: Quest Diagnostics Incorporated (DGX) Stock - Seeking Alpha SEC: EDGAR Search Results Quest Diagnostics Incorporated is a provider of diagnostic testing, information and services. It offers diagnostic testing services and products to patients, physicians, payers, and others. It offers the United States patients and physicians the access to diagnostic testing services through its nationwide network of laboratories and Company owned patient service centers. It is a provider of clinical testing, including gene-based and esoteric testing, anatomic pathology services and testing for drugs-of-abuse, and the provider of risk assessment services for the life insurance industry. It also is a provider of testing for clinical trials. Its diagnostics products business manufactures and markets diagnostic test kits and point-of-care testing. It provides testing services to a range of customers. In April 2011, it acquired Athena Diagnostics. In May 2011, it acquired Celera Corporation.