Fact Sheet

Quest Diagnostics works across healthcare to create a healthier world, one life at a time. We connect people, from clinicians to consumers, with laboratory insights that illuminate a path to better health. With a focus on delivering smarter, simpler testing, we help reveal new avenues to identify and treat disease, empower healthy behaviors and improve healthcare management. Quest Diagnostics serves half the physicians and hospitals in the United States and one in three American adults each year, and our nearly 57,000 employees work together to deliver diagnostic insights that inspire actions to transform lives.

• Generated 2025 revenues of approximately $11.04 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 nearly 57,000 employees dedicated to putting patients first every day
• Employs a medical and scientific staff of over 700 M.D.s and Ph.D.’s
• Operates over 7,700 patient access points in North America, including approximately 2,000 patient service centers
• Facilitates transport of specimens via a logistics network of over 4,000 courier vehicles and nearly 20 aircraft that collectively make more than 73,000 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.