Quest Diagnostics Incorporated , the nation's leading provider of diagnostic testing, information and services, announced that Kenneth W. Freeman, Chairman and Chief Executive Officer, is scheduled to speak at the U.S. Bancorp Piper Jaffray Health Care Conference on Tuesday, January 28, 2003, at The Pierre Hotel in New York City. The Quest Diagnostics presentation is scheduled to begin at 9:30 a.m. Eastern Time.

The presentation will be webcast live during the conference and will be available to registered investors on the following site: http://webcast.ibeam.com/starthere.asp?pres=21260&template=pjchc&exit=http:// www.questdiagnostics.com and to the public on http://www.questdiagnostics.com/. In addition, the archived webcast will be available starting approximately 3 hours after the actual presentation time and will be available for 30 days (March 5, 2003).

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/.

SOURCE: Quest Diagnostics Incorporated

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

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