 Mallinckrodt plc NYSE: MNK, a global biopharmaceutical company, announced its disappointment with the U.S. Court of Appeals for the District of Columbia decision to deny its request for a temporary injunction preventing the U.S. Centers for Medicare and Medicaid Services CMS from enforcing a change in Medicaid drug rebate calculation for Acthar Gel repository corticotropin injection. Mallinckrodt had asked for the temporary injunction as it appeals a lower court ruling that allowed CMS to reset the base date average manufacturer price AMP. The Appeals Court also ordered an expedited briefing and oral argument schedule that will likely lead to fall oral arguments, and potentially a ruling by end of year. 