Item 8.01. Other Events

On January 29, 2008, Quest Diagnostics Incorporated issued a press release announcing that the company is scheduled to speak at the Wachovia Securities 2008 Healthcare Conference on Wednesday, January 30, 2008, at the Langham Hotel, Boston, Massachusetts and that during the conference, the company will reaffirm its 2007 guidance for revenues of between $6.6 billion and $6.7 billion, and earnings per diluted share from continuing operations of between $2.84 and $2.91, before $0.04 per share in special charges recorded in the first quarter of 2007. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

Item 9.01. Financial Statements and Exhibits

c. Exhibit

99.1 Press release of Quest Diagnostics Incorporated dated January 29, 2008

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