UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934 (Amendment No. )

Filed by the Registrant   Filed by a Party other than the Registrant 
Check the appropriate box:

	Preliminary Proxy Statement
	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
	Definitive Proxy Statement
	Definitive Additional Materials
	Soliciting Material Pursuant to §240.14a-12

Quest Diagnostics Incorporated

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
	No fee required.
	Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.

	1)	Title of each class of securities to which transaction applies:
	2)	Aggregate number of securities to which transaction applies:
	3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
	4)	Proposed maximum aggregate value of transaction:
	5)	Total fee paid:
	Fee paid previously with preliminary materials.

	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	1)	Amount Previously Paid:
	2)	Form, Schedule or Registration Statement No.:
	3)	Filing Party:
	4)	Date Filed:

        As of March 15, 2005, there were 8,736,079 shares of common stock of Quest Diagnostics Incorporated (the “Company”) to be issued upon exercise of outstanding options, warrants and rights under equity compensation plans of the Company approved by security holders at a weighted-average exercise price of $64.38 and approximately 2,150,000 shares of common stock of the Company remaining available for future issuance under equity compensation plans of the Company approved by security holders.