CMS is extending the 2013 Medicare participation enrollment period for suppliers of durable medical equipment, prosthetics, orthotics, and supplies (DMEPOS) until April 15, 2013. By way of background, a supplier that signs a participation agreement commits to accepting the Medicare Part B rate as payment in full for all beneficiaries. Changes in a supplier’s participation status can only be made during the annual open enrollment period. While CMS is extending the deadline because some suppliers apparently were not aware of a previous deadline extension to February 15, the new announcement gives suppliers another opportunity to examine their participation status in light of recent Medicare payment developments, including sequestration and upcoming Medicare cuts for retail diabetic testing supplies. Any change in election status will be effective January 1, 2013, but CMS will not reprocess claims already filed.