MADISON, N.J., June 3, 2011 /PRNewswire/ — Quest Diagnostics
Incorporated (NYSE:
DGX), the world’s leading provider of diagnostic testing,
information and services, announced that it is scheduled to speak
at the Jefferies 2011 Global Healthcare Conference in New York
City. The presentation is scheduled for Monday, June 6, 2011 at
8:30 a.m. Eastern Time.

The presentation will be webcast live during the conference and
will be available to registered investors on the following site: http://www.wsw.com/webcast/jeff60/dgx/
and to the public on www.QuestDiagnostics.com/investor.
In addition, the archived webcast will be available starting one
hour after the conclusion of the live event and will remain
available until July 6, 2011.

Quest Diagnostics is the world’s leading provider of diagnostic
testing, information and services that patients and doctors need to
make better healthcare decisions. The company offers the broadest
access to diagnostic testing services through its network of
laboratories and patient service centers, and provides interpretive
consultation through its extensive medical and scientific staff.
Quest Diagnostics is a pioneer in developing innovative diagnostic
tests and advanced healthcare information technology solutions that
help improve patient care. Additional company information is
available at www.QuestDiagnostics.com.

Contacts:

Kathleen Valentine (Investors):   973-520-2900

Wendy Bost (Media):            
      973-520-2800

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