POWER OF ATTORNEY


	Know all by these presents, that the undersigned
hereby constitutes and appoints each of William J.
O'Shaughnessy, Jr., Michael E. Prevoznik, and Leo C.
Farrenkopf, Jr., signing singly, her true and lawful
attorney-in-fact to:

(1)	execute for and on behalf of the undersigned
all reports, including but not limited to, Forms 3, 4 and
5, in accordance with Section 16(a) of the Securities
Exchange Act of 1934 and the rules thereunder;

(2)	do and perform any and all acts for and on
behalf of the undersigned which may be necessary or
desirable to complete the execution of any such report
and the timely filing of such report with the United
States Securities and Exchange Commission and any other
authority; and

(3)	take any other action of any type whatsoever
in connection with the foregoing which, in the opinion
of such attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the undersigned,
it being understood that the documents executed pursuant
to this power of attorney shall be in such form and
contain such terms and conditions as such attorney-in-fact
may approve in his discretion.

	The undersigned hereby grants to each such attorney-
in-fact full power and authority to do and perform all and
every act and thing whatsoever requisite, necessary and
proper to be done in the exercise of any of the rights and
powers herein granted, as fully to all intents and purposes
as the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact,
or such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this
power of attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-
in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's
responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.  This power of attorney
shall remain in effect as long as the undersigned is
required to file reports under Section 16(a) with res-
pect to Quest Diagnostics Incorporated.

	IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 2nd
day of November, 2007.


	/s/Rosanne Haggerty
	Signature
	ROSANNE HAGGERTY



STATE OF NEW YORK	)
			):  ss.
COUNTY OF  NEW YORK	)

	On this 2nd day of November, 2007, before me, the
subscriber, personally appeared ROSANNE HAGGERTY, to me
and known to me to be the same person described in and
who executed the foregoing instrument, and she duly
acknowledged to me that she executed the same.


	/s/James R. Ratner
	Notary Public, State of New York
	No. 01RA6129372
	Qualified in New York County
	My Commission Expires June 22, 2009