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Financial Highlights Board Of Directors

INVESTOR INFORMATION
  COMMON STOCK
Quest Diagnostics Incorporated
(ticker symbol: "DGX") shares
are listed on the New York Stock
Exchange. Options on Quest
Diagnostics shares are traded
on the Chicago Board
Options Exchange.
ANNUAL MEETING
The annual meeting of
shareholders will be held on
Tuesday, May 10, 2005, at The
Waldorf-Astoria, New York,
New York, at 10:30 A.M.
Eastern Daylight Time. A proxy
statement and annual report were
mailed to shareholders of record
as of March 14, 2005.

ADDITIONAL INFORMATION
Corporate news releases, our
Annual Report, Proxy Statement,
Forms 10-K and 10-Q and other
information about the company,
including locations of facilities,
are available at Quest Diagnostics'
website at:
www.questdiagnostics.com

Address all inquiries to:
Investor Relations Department
Quest Diagnostics Incorporated
1290 Wall Street West
Lyndhurst, New Jersey 07071
(201) 393-5030
E-mail: investor@
questdiagnostics.com


TRANSFER AGENT
AND REGISTRAR

National City Bank acts as transfer
agent and registrar and dividend
  paying agent, and maintains all
shareholder records for the
company. If you have questions
about the shares of Quest
Diagnostics you own; wish to
report a change of address or
lost stock certificates or dividend
checks; or would like to enroll in
the company’s automatic dividend
reinvestment or direct deposit
program, please contact National
City Bank directly:

National City Bank
Shareholder Services
P.O. Box 92301
Cleveland, Ohio 44193-0900
Phone: (800) 622-6757
E-mail: shareholder.inquiries@
nationalcity.com


CORPORATE HEADQUARTERS
1290 Wall Street West
Lyndhurst, New Jersey 07071
(201) 393-5000

CORPORATE GOVERNANCE
Corporate Governance Guidelines,
the Code of Business Ethics and
the charters of the committees
of the Board are available at the
Quest Diagnostics website. Any
amendment to our Code of
Business Ethics, as well as any
waivers from certain provisions of
the code relating to our CEO and
senior financial officers, will be
posted on our website.

Quest Diagnostics has included as
Exhibit 31 to its Annual Report on
Form 10-K for fiscal year 2004
filed with the Securities and
Exchange Commission certificates
of Quest Diagnostics’ Chief
Executive Officer and Chief
Financial Officer regarding the
quality of the company’s public
  disclosure. Quest Diagnostics
has submitted to the New York
Stock Exchange (NYSE) a certificate
of its Chief Executive Officer
certifying that he is not aware of
any violations by Quest Diagnostics
of the NYSE corporate governance
listing standards.

Inquiries to the Board of Directors
may be sent via e-mail to:
leadindependentdirector@
questdiagnostics.com


TRADEMARKS
Quest Diagnostics, Quest, the
Sun-Q logo, ChartMaxx, and
Nichols Institute are registered
trademarks of Quest Diagnostics.

Care360 and CardioCRP are
trademarks of Quest Diagnostics.

InSure is a trademark of Enterix Inc.

CellSearch is a trademark of
Veridex, LLC.

Neither this report nor any
statement contained herein is
furnished in connection with any
offering of securities or for the
purpose of promoting or influencing
the sale of securities.

©2005 Quest Diagnostics
Incorporated. All rights reserved.

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