Medicare Glossary

CMS (Centers for Medicare & Medicaid Services)

The federal agency within the U.S. Department of Health and Human Services that administers Medicare, Medicaid, and the Children's Health Insurance Program (CHIP). CMS sets Medicare rules, approves plans, and regulates coverage standards.

Also known as: CMS

Dual Eligible

A person who qualifies for both Medicare and Medicaid at the same time. Medicaid can help pay Medicare premiums, deductibles, and other costs Medicare does not fully cover.

Also known as: Dually Eligible Beneficiary

Medicaid

A joint federal and state program that helps with medical costs for people with limited income and resources. Some people qualify for both Medicare and Medicaid (called "dual eligibles") and may receive extra help with costs.