Visit www.medicare.gov, or call 1.800.MEDICARE (1.800.633.4227), 24 hours a day, seven days a week (TTY/TDD: 1.877.486.2048 for the hearing impaired).. Our our Care Team is dedicated to personally solving any problems you may have with us and our providers to your full satisfaction. If you prefer to contact the Centers for Medicare and Medicaid Services (CMS) directly, please visit Medicare's ....