| Laboratory Corporation of America Holdings is an independent clinical laboratory company in the United States. The Company has a national network of 37 primary laboratories and over 1,600 patient service centers along with a network of branches and STAT laboratories, which are laboratories that have the ability to perform certain routine tests and report the results to the physician immediately. Through its national network of laboratories, the Company offers a range of clinical laboratory tests, which are used by the medical profession in routine testing, patient diagnosis, and in the monitoring and treatment of disease. In addition, the Company has developed specialty testing businesses based on certain types of specialized testing capabilities and client requirements, such as oncology testing, human immunodeficiency virus (HIV) genotyping and phenotyping, diagnostic genetics and clinical research trials. |