DESCRIPTION: Learn more about a specific topic and how to connect to additional resources and services. MORE INFORMATION The Centers for Medicare & Medicaid Services (CMS) is a federal agency within the United States Department of Health and Human Services that administers and oversees Medicare. The Center operates a toll-free helpline and an official government website to help consumers understand and use Medicare. Telephone assistance is available with a toll-free, 24/7/365 phone number. Get help with: * Comparing health and/or Part D drug plans using the [Medicare Plan Finder Tool](https://www.medicare.gov/plan-compare) * Reviewing, enrolling or changing Medicare Advantage or Medicare Part D plans * Learning what Medicare does and does not cover * Learning about Medicare health insurance and Medicare drug coverage (Part D) * Claims and appeals * Forms, publications * Identity theft and how to report fraud and abuse [Check the status of your eligibility, enrollment, benefits, and claims](https://www.medicare.gov/my/home) Centers for Medicare & Medicaid Services (CMS) also works in partnership with state governments to administer Medical Assistance, the State Children's Health Insurance Program, and health insurance portability standards.