LABORATORY CORPORATION OF AMERICA® ANNOUNCES DEFINITIVE AGREEMENT TO ACQUIRE SAN DIEGO-BASED PATHOLOGY MEDICAL LABORATORIES

Burlington, NC, May 4, 2000 - Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced that it has entered into a definitive agreement with San Diego-based Pathology Medical Laboratories (PML) to acquire PML's laboratory testing business.

LabCorp Shareholders Approve 1-For-10 Reverse Stock Split

Burlington, NC, May 2, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced the results of the vote reported during today's annual meeting of stockholders. The Company's stockholders voted in favor of the proposal to amend the Certificate of Incorporation to

LABORATORY CORPORATION OF AMERICA® HOLDINGS' FIRST QUARTER RESULTS SIGNIFICANTLY EXCEED EXPECTATIONS

Burlington, NC, April 24, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced results for the quarter ended March 31, 2000. Net sales for the first quarter were $462.7 million, operating income was $57.4 million, and net income was $25.7 million.

LABORATORY CORPORATION OF AMERICA® COMPLETES ACQUISITION OF BIO-DIAGNOSTICS LABORATORIES

Burlington, NC, April 19, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced that it has completed the acquisition of certain clinical testing assets of Bio-Diagnostics Laboratories (BDL). Based in Torrance, California, BDL is the largest provider of clinical

LABCORP SELECTED BY FOUNDATION HEALTH FEDERAL SERVICES AS A PREFERRED LAB PROVIDER FOR 1.3 MILLION TRICARE BENEFICIARIES

Burlington, NC, April 13, 2000 – Laboratory Corporation of America® Holdings (LabCorp®)) (NYSE: LH) announced today that it has been selected by Foundation Health Federal Services (FHFS) as a preferred lab provider for TRICARE beneficiaries in nine states.

Laboratory Corporation of America® Announces National Agreement with Aetna U.S. Healthcare

Burlington, NC, April 4, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) announced today that it has signed an extension to its existing agreement with Aetna U.S. Healthcare to provide laboratory services to Aetna U.S. Healthcare members.

LABORATORY CORPORATION OF AMERICA® ANNOUNCES PARTNERSHIP WITH VIROLOGIC INC. TO EXPAND HIV RESISTANCE TESTING SERVICES

Burlington, NC, March 23, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced the signing of an agreement to provide ViroLogic Inc.'s phenotypic HIV drug susceptibility assay, PhenoSenseTM HIV, through LabCorp's national laboratory services network.

LABORATORY CORPORATION OF AMERICA® ANNOUNCES DEFINITIVE AGREEMENT TO ACQUIRE SAN DIEGO-BASED POISONLAB

Burlington, NC, March 6, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced that it has entered into a definitive agreement with San Diego-based POISONLAB, Inc. to acquire all of the stock of POISONLAB's occupational substance abuse and clinical toxicology

LABORATORY CORPORATION OF AMERICA® REPORTS STRONG FOURTH QUARTER AND FULL YEAR RESULTS

Burlington, NC, February 15, 2000 — Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) today announced results for the quarter and twelve months ended December 31, 1999. Fourth Quarter Results Net sales for the fourth quarter were $422.7 million, compared to net sales of $407.8

LABCORP TO OFFER LATEST HPV TEST

Gaithersburg, MD and Burlington, NC (January 14, 2000) – Digene Corporation (Nasdaq: DIGE) and Laboratory Corporation of America® Holdings (LabCorp®) (NYSE: LH) announced today that they have entered into an agreement whereby LabCorp will utilize the Digene Hybrid Capture II HPV Test for women with