108 Medicare Terms Defined

Medicare Glossary

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

Showing 5 results for "Part D"clear search

E

Extra Help

Costs & Coverage

A federal program that helps people with limited income and resources pay Part D prescription drug costs, including premiums, deductibles, and copays. Also called the Low Income Subsidy (LIS).

Also known as: Low Income Subsidy, LIS

G

Grace Period

Costs & Coverage

A set amount of time after a premium due date, typically extending into the following month or two, during which you can still pay a missed Medicare Advantage, Part D, or Medigap premium before losing coverage.

I

IRMAA (Income-Related Monthly Adjustment Amount)

Costs & Coverage

An extra amount added to your Part B and Part D premiums if your income is above a certain threshold, based on the tax return from two years earlier. IRMAA is reassessed annually and can be appealed after certain life-changing events like retirement.

Also known as: IRMAA

L

Low Income Subsidy (LIS)

Costs & Coverage

See Extra Help. A federal program that reduces Part D costs for people with limited income and resources, covering most premiums, deductibles, and copays.

Also known as: LIS, Extra Help

P

Premium

Costs & Coverage

The amount you pay for your Medicare coverage, typically deducted monthly. Part A is premium-free for most people. Part B has a standard monthly premium (adjusted for income). Medicare Advantage and Part D plans have their own premiums in addition to Part B.

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