On January 21, 2103, the U.S. Supreme Court unanimously held in Sebelius v. Auburn Regional Medical Center that the Medicare statute does not permit the time period for filing an appeal with the Provider Reimbursement Review Board (PRRB) following a payment determination by a fiscal intermediary to be extended under the principle of equitable tolling. In Auburn, a number of hospitals argued that the statutorily prescribed 180-day time period for filing an appeal with the PRRB should be extended under the principle of equitable tolling because the hospitals did not know, and could not have known, that the Centers for Medicare & Medicaid Services (CMS) had used incomplete data in calculating the hospitals’ eligibility for, or amount of payment under, the disproportionate share hospital (DSH) adjustment. The Supreme Court rejected the hospitals’ argument and held that equitable tolling does not apply to administrative Medicare reimbursement appeals that are filed with the PRRB.