UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): June 3, 2005 Quest Diagnostics Incorporated 1290 Wall Street West Lyndhurst, NJ 07071 (201) 393-5000 001-12215 (Commission file number) Delaware (State of Incorporation) 16-1387862 (I.R.S. Employer Identification Number) Item 8.01 Other Events Quest Diagnostics Incorporated received a subpoena from the U.S. Attorney's office for the District of New Jersey. The subpoena seeks the production of business and financial records regarding capitation and risk sharing arrangements with government and private payers for the years 1993 through 1999. Quest Diagnostics is cooperating with the government's investigation. Signatures 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. June 3, 2005 QUEST DIAGNOSTICS INCORPORATED By: /s/ Sirisha Gummaregula ----------------------- Sirisha Gummaregula Assistant General Counsel and Corporate Secretary