EXHIBIT 21
LIST OF SUBSIDIARIES OF THE COMPANY
| 2089279 Ontario, Inc. |
| 2248848 Ontario, Inc. |
| 3065619 Nova Scotia Company |
| 3241287 Nova Scotia Company |
| 3901858 Canada Inc. |
| 896988 Ontario Inc. |
| Accupath Diagnostic Laboratories, Inc. dba US LABS |
| Beacon Laboratory Benefit Solutions, Inc. |
| Centrex Clinical Laboratories, Inc. |
| Clipper Holdings, Inc. |
| Colorado Coagulation Consultants, Inc. |
| Correlagen Diagnostics, Inc. |
| Cytometry Associates, Inc. |
| DCL Acquisition, Inc. |
| DCL Medical Laboratories, LLC |
| DCL Sub LLC |
| Decision Diagnostics LLC (aka DaVinici/Medicorp LLC) |
| Diagnostic Services, Inc. |
| DIANON Systems, Inc. |
| Dynacare - Gamma Medical Laboratories |
| Dynacare Company |
| Dynacare G.P. Inc. |
| Dynacare Holdco LLC |
| Dynacare Laboratories Limited Partnership |
| Dynacare Laboratories Inc. |
| Dynacare Northwest Inc. |
| Dynacare Realty Inc. |
| DynaLifeDX Diagnostic Laboratory Services |
| Endocrine Sciences, Inc. |
| Esoterix Clinical Trials Services BVBA (“Esoterix BVBA”) |
| Esoterix Genetic Laboratories, LLC (dba Genzyme Genetics) |
| Esoterix Genetic Laboratories Japan GK |
| Esoterix, Inc. |
| Execmed Health Services Inc. |
| FirstSource Laboratory Solutions, Inc. |
| Gamma-Dynacare Central Medical Laboratories GP Inc. |
| Gamma-Dynacare Central Medical Laboratory Limited Partnership |
| GDML Medical Laboratories Inc |
| Genzyme Genetic Counseling, LLC |
| Glen Ames LLP |
| HH/DL, L.P. |
| HHLA Lab-In-An-Envelope, LLC |
| Home Healthcare Laboratory of America, LLC |
| IDX Pathology, Inc |
| Lab Delivery Service of New York City, Inc. |
| Lab Newco Two, Inc. |
| Labwest, Inc. |
| LabCorp Development Company |
| LabCorp Limited |
| LabCorp Tennessee LLC |
| Laboratory Corporation of America (LCA) |
| Laboratory Corporation of America Holdings (LCAH) |
| LCAH Clipper, LP |
| LDS Diagnostic Laboratories Inc |
| Litholink Corporation |
| MD Datacor Inc. |
| Monogram Biosciences, Inc. |
| Monogram Biosciences – France SAS |
| Monogram Biosciences UK Limited |
| National Genetics Institute |
| New Imaging Diagnostics, LLC |
| New Molecular Diagnostics Ventures LLC |
| NWT Inc. |
| PA Labs, Inc. |
| Path Lab, Inc. d/b/a LabCorp |
| Persys Technology Inc. |
| Protedyne Corporation |
| Protedyne Ltd. |
| SW/DL LP |
| Tandem Labs Inc. |
| The Biomarker Factory, LLC |
| Tri-State Clinical Laboratory Services, LLC |
| United/Dynacare LLC |
| Viro-Med Laboratories, Inc. |
| Dynacare non-operating entities identified subsequent to the acquisition of Dynacare Inc. on July 25, 2002 |
| 1004679 Ontario Limited |
| 3024539 Nova Scotia Company |
| 563911 Ontario Limited |
| 794475 Ontario Inc. |
| 829318 Ontario Limited |
| 854512 Ontario Limited |
| 879606 Ontario Limited |
| 900747 Ontario Ltd. |
| 925893 Ontario Limited |
| 942487 Ontario Ltd. |
| 942489 Ontario Ltd. |
| 942491 Ontario Limited |
| 942492 Ontario Ltd. |
| 947342 Ontario Ltd. |
| 949235 Ontario Ltd. |
| 958069 Ontario Inc. |
| 977681 Ontario Inc. |
| 978550 Ontario Ltd. |
| 978551 Ontario Ltd. |
| Amherstview Medical Centre Developments Inc. |
| DHG Place Du Centre Clinique |
| Dynacare Canada Inc. |
| Dynacare International Inc. |
| Dynacare US Financing LLC |
| Glen Davis Equities Ltd. |
| L.R.C. Management Service Inc. |
| Lawrence-Curlew Medical Centre Inc. |
| Roselat Developments Limited |
| St. Joseph's Health Centre |
| Stockwin Corporation Ltd. |
| Thistle Place Care Corp. |
| Toronto Argyro Medical Laboratories Ltd. |
| Woodstock Medical Arts Building Inc. |