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): February 28, 2003

                         Quest Diagnostics Incorporated
             (Exact name of Registrant as specified in its charter)


                                                                  
          Delaware                              1-12215                    16-1387862
(State or other jurisdiction            Commission File Number          (I.R.S. Employer
     of incorporation)                                               Identification Number)

                          -----------------------------

                               One Malcolm Avenue
                           Teterboro, New Jersey 07608
                                 (201) 393-5000
         (Address of principal executive offices and telephone number,
                              including area code)

                          -----------------------------



Item 9.           Regulation FD Disclosure.
                  ------------------------

On February 27, 2003, Kenneth W. Freeman, the Chief Executive Officer of Quest
Diagnostics Incorporated, and Robert A. Hagemann, the Chief Financial Officer of
Quest Diagnostics Incorporated, submitted to the Securities and Exchange
Commission sworn statements pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.








                                    Signature



                  Pursuant to the requirements of the Securities Exchange Act of
1934, as amended, the registrant has duly caused this report to be signed on its
behalf by the undersigned hereunto duly authorized.

Dated:   February 28, 2003

                         QUEST DIAGNOSTICS INCORPORATED

                         By:    /s/Leo C. Farrenkopf, Jr.
                                -----------------------------------------
                                Name:  Leo C. Farrenkopf, Jr.
                                Title:  Vice President and Secretary

Exhibit Index

Exhibit 99.1 Statement Pursuant to 18. U.S.C. 'SS' 1350 of Chief Executive
Officer dated February 27, 2003

Exhibit 99.2 Statement Pursuant to 18. U.S.C. 'SS' 1350 of Chief Financial
Officer dated February 27, 2003


                            STATEMENT OF DIFFERENCES
                            ------------------------
The section symbol shall be expressed as..................................'SS'