Quest Diagnostics is the nation's leading provider of diagnostic testing, information and services that patients and doctors need to make better healthcare decisions. With $5.5 billion in annual revenues, Quest Diagnostics offers the broadest access to clinical testing services through its national network of 30-plus regional laboratories, approximately 150 rapid response laboratories and over 2,000 patient service centers.

Quest Diagnostics is the leading provider of specialty testing, including gene-based testing, and is the leader in routine medical testing, drugs of abuse testing, and a leader in anatomic pathology testing. Through partnerships with pharmaceutical, biotechnology and information technology companies, Quest Diagnostics provides support to help speed the development of health care insights and new therapeutics.

Quest Diagnostics is also the leading provider of risk assessment services to the life insurance industry.