This company pricks and prods for profit. Laboratory Corporation of America (LabCorp) is a top provider of clinical laboratory services, performing blood and other tests on more than 500,000 specimens daily for more than 220,000 clients including managed care organizations, hospitals, doctors, government agencies, drug companies, and employers. Services range from routine urinalyses, HIV tests, and Pap smears to specialty testing for diagnostic genetics, disease monitoring, forensics, identity, clinical drug trials, and allergies. Through Covance, it provides end-to-end drug development support. LabCorp operates more than 1,700 service sites that collect specimens and some 40 primary labs where tests are performed.