Quest Diagnostics Incorporated operates in the Medical laboratories sector. 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. In April 2011, it acquired Athena Diagnostics. In May 2011, it acquired Celera Corporation. In January 2012, the Company acquired S.E.D. Medical Laboratories. In our complete report available for purchase the company is compared to: Laboratory Corporation of America Holdings, DaVita Incorporated and Tenet Healthcare Corporation.