Quest Diagnostics is a clinical laboratory and diagnostics company headquartered in the United States. It is the world's leading provider of diagnostic information services, connecting clinicians and consumers with laboratory insights to improve health. Its core services help identify and treat disease, empower healthy behaviors, and improve healthcare management. The company serves approximately half the physicians and hospitals in the United States, and its work touches the lives of one in three American adults each year.
Scale is a defining feature of Quest Diagnostics. The company employs nearly 57,000 people, including a medical and scientific staff of over 700 M.D.s and Ph.D.s. Its North American logistics network operates over 7,700 patient access points, approximately 2,000 patient service centers, a fleet of over 4,000 courier vehicles, and nearly 20 aircraft, enabling more than 73,000 daily stops to transport and process diagnostic specimens.
For technologists, Quest Diagnostics sits at the intersection of healthcare, data, and large-scale operations. The company's work in diagnostic information services and laboratory insights generates and relies upon significant data infrastructure to support clinical decision-making and healthcare management across the United States and North America.






