108 Medicare Terms Defined

Medicare Glossary

Plain-English definitions for every Medicare term — from ABN to ZIP enrollment. No jargon, no confusion.

Terms starting with "C" — 2 terms

C

CMS (Centers for Medicare & Medicaid Services)

Medicare Basics

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

Related: Medicare Medicaid Federal government

Coordination of Benefits

Medicare Basics

The process used to determine which insurance plan pays first when you have more than one health coverage. Medicare has specific rules about whether it pays primary or secondary to other insurance.

Also known as: COB

Related: Primary payer Secondary payer Employer coverage

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