Exhibit 23.2



INDEPENDENT AUDITOR'S CONSENT

We consent to the incorporation by reference in this Post-Effective Amendment
No. 1 to Registration Statement No. 333-88330 of Quest Diagnostics Incorporated
on Form S-4 of our reports dated February 1, 2002, appearing in the Annual
Report on Form 10-K of Unilab Corporation for the years ended December 31, 2001
and 2000, and to the reference to us under the heading "Experts" in the
Prospectus, which is part of such Registration Statement.


/s/ Deloitte & Touche LLP

Los Angeles, California
January 20, 2003