UNITED STATES 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
                      NOVEMBER 18, 1999
                     ------------------
              (Date of earliest event reported)


         LABORATORY CORPORATION OF AMERICA HOLDINGS
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   (Exact name of registrant as specified in its charter)


   DELAWARE              1-11353             13-3757370
   --------              -------             ----------
(State or other         (Commission         (IRS Employer
jurisdiction of         File Number)         Identification
incorporation)                               Number)


   358 SOUTH MAIN STREET, BURLINGTON, NORTH CAROLINA 27215
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          (Address of principal executive offices)

                        336-229-1127
                        ------------
    (Registrant's telephone number, including area code)


ITEM 5. OTHER EVENTS On November 18, 1999, Healthworks Alliance, Inc. (Healthworks) and Laboratory Corporation of America- Registered Trademark- Holdings (LabCorp-Registered Trademark-) announced that LabCorp will utilize Healthworks'connectivity tools to electronically receive orders from (and transmit results to) LabCorp's joint venture hospital partners. The modified agreement provides for the use of Healthworks' software to communicate lab orders and results between physician offices using Medic Computer Systems' software and LabCorp's regional testing facilities. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) Exhibit 20 Press release of the Company dated November 18, 1999.

SIGNATURES Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. LABORATORY CORPORATION OF AMERICA HOLDINGS ------------------------------------------ (Registrant) By:/s/ BRADFORD T. SMITH ------------------------------ Bradford T. Smith Executive Vice President, General Counsel, Secretary and Compliance Officer Date: December 1, 1999


Healthworks Alliance, Inc.                  Laboratory Corporation of America
1018 West 8th Avenue                        358 South Main Street
King of Prussia, PA 19406                   Burlington, NC 27215

Contact:  Jack Darnell                      Contact:  Pamela Sherry
Vice  President, Business Development       Vice  President, Investor Relations
Phone:   800.335.8346 extension 111         Phone: 336.584.5171 extension 4855
Fax:     610.354.8802                       Fax:   336.513.4806
email:   jdarnell@hworks.com                email: sherryp@labcorp.com


  KING   OF   PRUSSIA,  Pennsylvania,  BURLINGTON,  North   Carolina,
November  18,  1999:   Healthworks Alliance, Inc.  (Healthworks)  and
Laboratory  Corporation of America-Registered Trademark- Holdings
(LabCorp-Registered Trademark-)  (NYSE:  LH) today  announced that
LabCorp will utilize Healthworks'  connectivity tools to electronically
receive orders from (and transmit results to) LabCorp's  joint  venture
hospital partners.  The modified  agreement provides  for  the  use of
Healthworks' software to  communicate  lab orders  and  results between
physician offices using  Medic  Computer Systems' (Medic) software and
LabCorp's regional testing facilities.
     Under the expanded agreement, Healthworks will develop and deploy
interfaces  between LabCorp's regional testing facilities  and  their
hospital  partners' laboratory information systems.  In addition,  in
support  of  an  existing  agreement between Healthworks  and  Medic,
LabCorp's local sales teams will be working to increase the number of
Medic sites that communicate lab orders electronically to LabCorp.
     Commenting on the expansion, Stevan R. Stark, LabCorp's executive
vice president of sales and marketing said: "Expanding this agreement
enables   LabCorp   to  utilize  Healthworks'  proven   services   in
establishing electronic connections with our joint venture  partners.
Healthworks'  standard  connection with  Medic  will  streamline  our
ability  to connect these sites more efficiently.  By automating  the
receipt  of requisitions and transmission of results, LabCorp expects
to  reduce  its operating costs while providing enhanced services  to
both our hospital and physician office clients, and ultimately to the
patients they serve."
     According  to Adolf A. Paier, Healthworks' president and  chairman:
"Our relationship with LabCorp has been very positive since we signed
the  original  agreement in 1996.  The expansion  of  this  agreement
represents  Healthworks' continuing commitment to meet the  realities

of the new market dynamics where commercial labs are focusing on electronic connectivity as a means of reducing on-going transaction costs. With Healthworks' ability to electronically link a large number of Medic sites as well as LabCorp's hospital clients, LabCorp should realize cost savings, improve service and minimize the impact on their development resources." Healthworks Alliance, Inc. develops and markets application software used by healthcare facilities for medical necessity compliance validation, by ambulatory centers for automated order entry and results reporting to local and national laboratories, and by laboratory networks and commercial labs to facilitate electronic orders and results. For more information, visit the Healthworks Alliance web site at http://www.hworks.com or contact Healthworks at (800) 335-8346. Laboratory Corporation of America-Registered Trademark- Holdings (LabCorp-Registered Trademark-) is a national clinical laboratory with annual revenues of $1.6 billion in 1998. With 18,000 employees and over 100,000 clients nationwide, the company offers more than 2,000 clinical tests, ranging from simple blood analyses to more sophisticated technologies. Included in LabCorp's network of 25 major laboratories are three Centers of Excellence. The Center for Molecular Biology and Pathology, in Research Triangle Park (RTP), North Carolina, develops applications for polymerase chain reaction (PCR) technology. Its Center for Occupational Testing in RTP is the world's largest substance abuse testing facility, and the Center for Esoteric Testing in Burlington, North Carolina, performs the largest volume of rare analyses in the network. LabCorp's clients include physicians, state and federal governments, managed care organizations, hospitals, clinics, pharmaceutical and Fortune 1000 companies, and other clinical laboratories. Visit LabCorp's web site at http://www.labcorp.com. Raleigh, NC-based Medic Computer Systems, Inc., a member of the Misys Group of Companies, is the leading provider of healthcare information systems to integrated delivery networks, management service organizations, managed care organizations, hospitals, physician practices, and home healthcare agencies. Medic's products are designed to manage financial, administrative, clinical and managed care information. Visit Medic's Web page at www.medcmp.com or contact Medic at 1-800-334-8534 ext.1757 for additional information. The companies noted that each of the above forward-looking statements was subject to change based on various important factors, including without limitation, competitive actions in the marketplace and adverse actions of governmental and other third-party payors. Further information on potential factors that could affect LabCorp's financial results is included in LabCorp's Form 10-K for the year ended December 31, 1998 and subsequent filings.