SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 -------------------------------------------------------------------------------- FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported): April 21, 2005 Commission file number 1-12215 Quest Diagnostics Incorporated 1290 Wall Street West Lyndhurst, NJ 07071 (201) 393-5000 Delaware (State of Incorporation) 16-1387862 (I.R.S. Employer Identification Number) Item 2.02. Results of Operations and Financial Condition The following information is furnished pursuant to Item 2.02, "Results of Operations and Financial Condition." On April 21, 2005, Quest Diagnostics Incorporated issued a press release announcing, among other things, its results for the quarter ended March 31, 2005. 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 April 21, 2005 announcing, among other things, its results for the quarter ended March 31, 2005. Signature Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. April 21, 2005 QUEST DIAGNOSTICS INCORPORATED By: /s/Robert A. Hagemann -------------------------- Robert A. Hagemann Senior Vice President and Chief Financial Officer