Quest Diagnostics Incorporated , the nation's leading provider of diagnostic testing, information and services, announced that Surya N. Mohapatra, President and Chief Operating Officer, is scheduled to speak at the Goldman Sachs Twenty-Fourth Annual Global Healthcare Conference on Tuesday, June 10, 2003, at The Ritz-Carlton Laguna Niguel Hotel in Dana Point, California. The Quest Diagnostics presentation is scheduled to begin at 8:20 a.m. Pacific Time.

The presentation will be webcast live during the conference and will be available to registered investors on the following site: http://customer.nvglb.com/GOLD006/060903a_by/default.asp?entity=quest and to the public on http://www.questdiagnostics.com/. In addition, the archived webcast will be available starting approximately 5:00 p.m. Eastern Time on Tuesday, June 10, 2003 and will be available for 30 days.

Quest Diagnostics Incorporated is the nation's leading provider of diagnostic testing, information and services, providing insights that enable physicians, hospitals, managed care organizations and other healthcare professionals to make decisions to improve health. The company offers the broadest access to diagnostic laboratory services through its national network of laboratories and patient service centers. Quest Diagnostics is the leading provider of esoteric testing, including gene-based medical testing, and empowers healthcare organizations and clinicians with state-of-the-art connectivity solutions that improve practice management. Additional company information can be found on the Internet at: http://www.questdiagnostics.com/.

The statements in this press release which are not historical facts or information may be forward-looking statements. These forward-looking statements involve risks and uncertainties that could cause actual results and outcomes to be materially different. Certain of these risks and uncertainties may include, but are not limited to, unanticipated expenditures, changing relationships with customers, suppliers and strategic partners, conditions of the economy and other factors described in the Quest Diagnostics Incorporated 2002 Form 10-K and subsequent filings.

SOURCE: Quest Diagnostics Incorporated

CONTACT: Investors, Laure Park, +1-201-393-5030, or Media, Gary Samuels,
+1-201-393-5700, both of Quest

Web site: http://www.questdiagnostics.com/