Under a new Pennsylvania law which took effect on January 22, 2011, physicians who bill patients or third party payers for clinical pathology laboratory tests purchased from an independent laboratory are required to disclose on the bill the name of the laboratory from which the service was purchased, the amount paid by the physician to the lab and the physician’s acquisition or processing (e.g., mark-up) charge for the service. Failure to comply with the law may be ground for disciplinary action against the physician’s license.