Centers for Medicare & Medicaid Services

An official website of the United States government.

CMS is the federal agency that provides health coverage to more than 160 million through Medicare, Medicaid, the Children's Health Insurance Program, and the Health Insurance Marketplace. CMS works in partnership with the entire health care community to improve quality, equity and outcomes in the health care system.

If you would like to reach out to CMS to voice your concerns surrounding Medicare Advantage Plans, the button below will take you to their Provider Complaints Form.