Bio-Reference Laboratories, Inc. provides clinical laboratory testing services primarily in the greater New York metropolitan area. It offers various chemical diagnostic tests, including blood and urine analysis, blood chemistry, hematology services, serology, radioimmuno analysis, toxicology, pap smears, tissue pathology, and other tissue analysis. The company also operates a clinical knowledge management service unit, which uses customer data from laboratory results, pharmaceutical data, claims data, and other data sources to provide administrative and clinical decision support systems.