Monday, November 14, 2011 CMS Posts List of Providers Requested to Revalidate Medicare Enrollment Information In response to provider requests, the Centers for Medicare and Medicaid Services (CMS) has posted a listing of providers who have been sent a request to revalidate their Medicare enrollment information. The listing contains the name and national provider identifier (NPI) of each provider sent a letter, and the date the letter was sent. To see the listing, click on "Revalidation Phase 1 Listing" in the downloads section of the Medicare Provider Supplier Enrollment Revalidation Page. (Users must widen each column in the spreadsheet to view the contents.) CMS will be updating this list monthly. Providers who are listed but have not received the request should contact their Medicare contractor. For more information on revalidation of Medicare provider enrollment, see the MLN Matters article Further Details on the Revalidation of Provider Enrollment Information, revised on November 1.