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Insurance

What is Medicare supplement insurance?

Quick Answer

Medicare supplement insurance (Medigap) is private insurance that pays cost-sharing left over by Original Medicare - the Part A deductible, Part B 20% coinsurance, and excess charges.

Stack showing Original Medicare gaps that Medigap fills.
Warren Team
Updated April 26, 2026
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The information provided is for educational purposes only and should not be considered as personalized financial advice. Warren is a registered investment advisor. Past performance does not guarantee future results. Please consult with a qualified financial advisor before making investment decisions.

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