Fact Sheet

Quest Diagnostics works across the healthcare ecosystem to create a healthier world, one life at a time. We provide diagnostic insights from the results of our laboratory testing to empower people, physicians and organizations to take action to improve health outcomes. Derived from one of the world's largest databases of de-identifiable clinical lab results, Quest's diagnostic insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. Quest Diagnostics annually serves one in three adult Americans and half the physicians and hospitals in the United States, and our over 55,000 employees understand that, in the right hands and with the right context, our diagnostic insights can inspire actions that transform lives and create a healthier world.

• Generated 2024 revenues of approximately $9.87 billion
• Provides an industry-leading menu of thousands of laboratory tests, ranging from advanced genomic tests for cancer and rare diseases to routine preventive tests for heart disease, diabetes and other chronic conditions
• Wins numerous awards and honors, including FORTUNE World’s Most Admired Companies – 2025.
• Touches the lives of one-third of American adults each year
• Serves approximately half of the physicians and hospitals in the U.S. annually
• Enables access for approximately 90% of U.S. insured lives
• Engages workforce of over 55,000 employees dedicated to putting patients first every day
• Employs a medical and scientific staff of approximately 850 M.D.s and Ph.D.’s
• Operates approximately 8,000 patient access points in North America, including 2,400 patient service centers (with 2,000 across the United States)
• Facilitates transport of specimens via a logistics network of approximately 5,000 courier vehicles and nearly 20 aircraft that collectively make more than 83,000 stops daily
• Delivers a broad range of customizable services for health systems and hospitals through Collaboration Lab Solutions (Co-Lab)
• Provides a broad range of solutions for employers, including workplace drug testing for employers and government agencies; our Workforce Health Solutions wellness screenings; and risk assessment services for the life insurance industry
• Publishes original research in peer reviewed publications, at medical and scientific conferences, and as a public service, including Quest Diagnostics Health Trends reports on national health trends and Quest Diagnostics Drug Testing Index (DTI) reports on workplace drug testing

• Diagnostics information services
• Clinical trials
• Healthcare IT
• Risk management
• Employer population health
• Drug Screening

Read more about products and services.

• Headquarters in the U.S.: 500 Plaza Drive, Secaucus, New Jersey 07094  
• Approximately 2,000 patient locations and dozens of clinical laboratories throughout the U.S. 

Read more about our locations.