Quest Diagnostics is a leading provider of diagnostic information services based in the United States. The company was founded in 1967 as Metropolitan Pathology Laboratory, Inc., and it changed its name to Quest Diagnostics in 1996. Its headquarters are located in Secaucus, New Jersey.

Quest Diagnostics offers a wide range of products and services, primarily focusing on diagnostic testing. The company offers clinical testing services, including blood tests, urine tests, and genetic testing. Additionally, Quest Diagnostics provides drug testing, behavioral health testing, and infectious disease testing.

The company also offers clinical trials testing and risk assessment services. On a global scale, Quest Diagnostics operates through a network of laboratories, patient service centers, and other facilities. The company has operations in the United States, as well as outside the country.

Notable subsidiaries of Quest Diagnostics include AmeriPath, a leading provider of anatomic pathology services, and ExamOne, a provider of risk assessment services. Quest Diagnostics has a strong market position and is one of the largest diagnostic information services companies globally. The company generates significant sales both domestically and internationally.

In terms of competitors, some of the key players in the industry include Laboratory Corporation of America Holdings (LabCorp) and Eurofins Scientific. In recent years, Quest Diagnostics has made significant achievements and changes to its product lineup. The company has expanded its offerings in genetic testing and has focused on developing innovative testing methodologies.

Quest Diagnostics has also made strategic acquisitions to enhance its capabilities and expand its market reach. As of the latest information available, Quest Diagnostics continues to be a major player in the diagnostic information services industry. The company is dedicated to providing high-quality testing services and is committed to driving innovation and advancing healthcare diagnostics