Quest Diagnostics provides laboratory testing and diagnostic insights to physicians, hospitals, health plans, government agencies, employers, pharmaceutical companies, and patients across the healthcare ecosystem. The company serves approximately one-third of the U.S. adult population annually and generated $11.0 billion in net revenues in 2025.
Quest operates through a network of laboratories, patient service centers, and offices primarily in the United States, with selected international locations. Consumer-initiated testing is also offered through QuestHealth.com. The company's strategy focuses on delivering high-quality, convenient, and affordable diagnostic services to support clinical decision-making and improve health outcomes across the healthcare system.
Diagnostic Information Services Business 98% · All Other Segments 2%
business segments · FY2025 (ended Dec 2025) · share of tagged segment revenue (10-K XBRL, as filed)
