Press Release Details

Quest Diagnostics to Speak at the 2008 Credit Suisse Healthcare Conference

11/10/2008

MADISON, N.J., Nov. 10 /PRNewswire-FirstCall/ -- Quest Diagnostics Incorporated (NYSE: DGX), the world's leading provider of diagnostic testing, information and services, announced that it is scheduled to speak at the Credit Suisse Healthcare Conference on Wednesday, November 12, 2008. The Quest Diagnostics presentation is scheduled to begin at 10:00 a.m. Eastern Time.

During the conference, the company will reaffirm its 2008 guidance for revenue growth of greater than 8%, operating income to approach 17% of revenues, and adjusted earnings per diluted share from continuing operations of between $3.17 and $3.22. This excludes the impact of a third quarter equity investment write-down and hurricanes.

The presentation will be webcast live during the conference and will be available to registered investors on the following site: http://w.on24.com/r.htm?e=125462&s=1&k=FA4CC8E22828DA92BFF1D58C23AB47B1 and to the public on www.QuestDiagnostics.com/investor. In addition, the archived webcast will be available within 24 hours after the conclusion of the live event and will remain available until December 14, 2008.

Quest Diagnostics is the world's leading provider of diagnostic testing, information and services that patients and doctors need to make better healthcare decisions. The company offers the broadest access to diagnostic testing services through its national network of laboratories and patient service centers, and provides interpretive consultation through its extensive medical and scientific staff. Quest Diagnostics is a pioneer in developing innovative new diagnostic tests and advanced healthcare information technology solutions that help improve patient care. Additional company information is available at: www.QuestDiagnostics.com.

SOURCE Quest Diagnostics

CONTACT: Investors, Laure Park, +1-973-520-2900; Media, Nancy
Fitzsimmons, +1-973-520-2800/
/Web Site: http://www.QuestDiagnostics.com /
(DGX)