Vedanth Bhartee
Writer · Reviewed by Richard ChanUpdated Jun 12, 2026
2 min read
Medigap, or Medicare Supplement Insurance, is sold by private companies to cover costs that Original Medicare does not, such as copayments, coinsurance, and deductibles.
Beneficiaries must have Medicare Part A and Part B to purchase a Medigap policy, and it does not work with Medicare Advantage plans.
Medigap policies are standardized by letters, meaning a specific plan offers the exact same basic benefits regardless of which insurance company sells it.
Medigap, also known as Medicare Supplement Insurance, is a private health insurance option designed to complement Original Medicare (Part A and Part B) by providing additional coverage for out-of-pocket costs. Medigap plans are offered by private insurance companies and help beneficiaries fill the “gaps” in Medicare coverage, such as deductibles, coinsurance, and copayments. Understanding the concept of Medigap, its standardized plan options, and its role in enhancing financial protection for Medicare beneficiaries is essential for making informed decisions about healthcare coverage. In this article, we explore the features of Medigap, its benefits, and how it works in conjunction with Original Medicare to provide comprehensive coverage.
Medigap plans have the following key features:
Medigap plans are identified by letters (e.g., Plan A, Plan B, etc.). Some of the most popular standardized Medigap plans include:
Medigap (Medicare Supplement Insurance) serves as a valuable option for Medicare beneficiaries seeking to enhance their Original Medicare coverage by filling in the gaps and providing greater financial protection. With standardized plan options, nationwide coverage, and guaranteed renewability, Medigap plans offer peace of mind and predictability in healthcare expenses. By understanding the features of Medigap plans and evaluating your healthcare needs, you can make an informed decision about which plan best aligns with your requirements and provides the desired level of coverage and cost-sharing, ensuring comprehensive and affordable healthcare coverage throughout your Medicare journey.