The Department of Consumer Affairs (DCA), which oversees the Medical Board, investigated whether Dr. Marc Wolfsohn, a pain management specialist, was overprescribing opiate painkillers. Based on a report from the Controlled Substance Utilization Review and Evaluation System (CURES), investigators identified five patients who may have been prescribed excessive doses. The DCA served a subpoena duces tecum on Dr. Wolfsohn to produce more than two years of medical records for the five patients. After Dr. Wolfsohn objected on patient privacy grounds, the DCA secured an order compelling production. Dr. Wolfsohn appealed.