Beneficiaries have the right to get Medicare information in an accessible format and file a complaint if they feel they’ve been discriminated against. They can contact the Centers for Medicare & Medicaid Services (CMS) to file a complaint or request information in an accessible format. CMS provides several ways to file a complaint, including online, by mail, or by phone. The contact information for filing a complaint or requesting information in an accessible format can be found on the CMS website or by contacting the CMS Regional Office.