QUEST DIAGNOSTICS INC

Quest Diagnostics operates as a clinical laboratory testing and diagnostic services provider serving healthcare systems, physicians, hospitals, employers, and consumers across the United States and internationally. The company develops and delivers diagnostic information services encompassing routine and advanced clinical testing, anatomic pathology testing, and diagnostic data services. It distributes these services through a network of company-operated laboratories, patient service centers, and mobile phlebotomy units, along with testing capabilities embedded in physician offices.

The company serves multiple customer categories including health plans, government agencies, employers, pharmaceutical companies, insurance carriers, and accountable care organizations. Its service portfolio extends beyond core laboratory testing to include risk assessment services for the life insurance industry and information technology solutions for healthcare organizations and clinicians. The company operates under several brands including Quest Diagnostics, AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum, each addressing specific market segments or service lines.

Quest Diagnostics employs approximately 57,000 full-time employees and maintains a significant scale within the U.S. diagnostic testing industry. The company was incorporated in Delaware and is headquartered in Secaucus, New Jersey. It has maintained operations since its founding in 1967.