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Centers for Medicare and Medicaid Services (CMS)

The Centers for Medicare and Medicaid Services (CMS) provides health coverage to more than 100 million people through Medicare, Medicaid, the Children’s Health Insurance Program, and the Health Insurance Marketplace. The CMS seeks to strengthen and modernize the Nation’s health care system, to provide access to high quality care and improved health at lower costs.

Toll-free number

  • 1-800-633-4227
  • 1-800-447-8477 (Medicare fraud hotline)



Find an office near you

Contact state Medicaid offices

Main address

Office of External Affairs
7500 Security Blvd.
Baltimore, MD 21244

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