SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported): August 8, 2005

                                  LabOne, Inc.
                      ------------------------------------
                          (Exact name of registrant as
                            specified in its charter)

      Missouri                       0-16946                43-1039532
---------------------             -------------         -----------------
  (State or other            (Commission File Number)   (I.R.S. Employer
    jurisdiction                                        Identification No.)
 of incorporation)



                 10101 Renner Boulevard, Lenexa, Kansas 66219
                 --------------------------------------------
              (Address of principal executive offices) (Zip code)

Registrant's telephone number, including area code:     913-888-1770 
                                                    ----------------------

                               Not Applicable
              ---------------------------------------------------
         (Former name or former address, if changed since last report)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425) 
[X] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
    240.14a-12)
[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR  240.14d-2(b)) Pre-commencement  communications pursuant to Rule
    13e-4(c) ] under the Exchange Act (17 CFR 240.13e-4(c))





Item 7.01  Regulation FD Disclosure

      LabOne, Inc. (the "Company") and Quest Diagnostics  Incorporated ("Quest")
hosted a joint  conference  call with investors on August 8, 2005 to discuss the
proposed  acquisition  of the Company by Quest pursuant to an Agreement and Plan
of Merger,  dated as of August 8, 2005,  by and among the  Company,  Quest and a
wholly-owned  subsidiary  of Quest.  Pursuant to  Regulation  FD, this report is
being  filed for the  purpose  of  furnishing  to the  Securities  and  Exchange
Commission the Conference Call Transcript, a copy of which is attached hereto as
Exhibit 99.1.

      To hear a simulcast of the call over the Internet or a replay,  registered
analysts may access  StreetEvents at:  www.streetevents.com;  and all others may
access the Quest Diagnostics website at: www.Quest Diagnostics.com. In addition,
a replay of the call will be available from 11 a.m. on August 8, 2005 through 11
p.m.  on August 22,  2005 to  investors  in the U.S.  by  dialing  888-568-0443.
Investors  outside the U.S. may dial  402-530-7976.  No password is required for
either number.

Item 8.01  Other Events

In connection  with the proposed  transactions,  the Company and Quest intend to
file relevant  materials  with the  Securities  and Exchange  Commission  (SEC),
including a proxy  statement.  Because those  documents  will contain  important
information,  holders  of the  Company's  common  stock  are  urged to read them
carefully,  when they become  available.  When filed with the SEC,  they will be
available free of charge (along with any other  documents and reports filed with
the SEC by the  Company and Quest) at the SEC's Web site,  www.sec.gov,  and the
Company's shareholders will receive information at an appropriate time on how to
obtain  these  documents  and  reports  free of charge  from the  Company.  Such
documents  are not  currently  available.  The proxy  statements  and such other
documents may also be obtained free of charge from the Company by directing such
request to: Office of Investor Relations,  LabOne, Inc., 10101 Renner Boulevard,
Lenexa, Kansas 66219.

The  Company  and its  directors  and  executive  officers  may be  deemed to be
participants  in the  solicitation  of proxies from the holders of the Company's
common stock in connection with the proposed transaction.  Information about the
Company's  directors and executive officers and their ownership of the Company's
common stock is set forth in the proxy  statement for the Company's  2005 Annual
Meeting  of  Stockholders,  which  was  filed  with the SEC on April  19,  2005.
Investors  may obtain  additional  information  regarding  the interests of such
participants by reading the proxy statement when it becomes available.

Quest and its directors and executive  officers may be deemed to be participants
in the solicitation of proxies from the holders of the Company's common stock in
connection with the proposed  transactions.  Information about the directors and
executive officers of Quest is set forth in the proxy statement for Quest's 2005
Annual Meeting of Shareholders,  which was filed with the SEC on March 31, 2005.
Investors  may obtain  additional  information  regarding  the  interest of such
participants by reading the proxy statement when it becomes available.


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Item 9.01  Financial Statements and Exhibits

Number       Description
------       -----------

99.1         August 8, 2005 Conference Call Transcript









                                   SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                  LABONE, INC.



Date:  August 8, 2005          By: /s/ John W. McCarty             
                                   ----------------------------------------
                                   John W. McCarty
                                   Executive Vice President and
                                   Chief Financial Officer





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