Quest Diagnostics Inc.

Quest Diagnostics Inc. is a leading healthcare company specializing in diagnostic information services, with a significant presence in the global diagnostics and research sector. The company provides laboratory testing services that are crucial for medical decision-making, serving physicians, hospitals, and patients. Quest Diagnostics processes one of the largest databases of de-identified clinical lab results worldwide, enabling it to deliver actionable diagnostic insights that support disease detection, treatment management, and overall healthcare quality. The company operates at scale, reportedly serving one in three adult Americans and partnering with over half of U.S. physicians and hospitals. Its offerings encompass a broad range of tests, including routine blood work, advanced genetic screenings, and specialized clinical testing. Quest Diagnostics plays a vital role in the healthcare ecosystem by empowering individuals and organizations with timely, reliable data that informs clinical practice and public health decisions. The company’s extensive reach, data-driven approach, and commitment to innovation reinforce its status as a foundational asset within the healthcare and diagnostic services market.

CEO

Mr. James E. Davis

Employees

55,000

Website

questdiagnostics.com