Business: Quest Diagnostics Incorporated is a provider of diagnostic testing, information and services, providing insights that enable patients and physicians to make healthcare decisions. Quest Diagnostics offers United States patients and physicians the access to diagnostic testing services through its nationwide network of laboratories and Company-owned patient service centers. The Company provides interpretive consultation through the medical and scientific staff. Quest is a provider of clinical testing, including gene-based and esoteric testing and anatomic pathology services, and the provider of risk assessment services for the life insurance industry. The Company also is a provider of testing for clinical trials and testing for drugs of abuse.