The fee for submitting your Medicare enrollment application, including for revalidations, has gone up. The price has changed from $560 in 2017 to $569 in 2018, the Centers for Medicare & Medicaid Services says in a message to providers. See details of the fee in a Dec. 4, 2017, Federal Register notice at www.gpo.gov/fdsys/pkg/FR-2017-12-04/pdf/2017-25972.pdf.