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Supplemental Insurance For Original Medicare (Medigaps)

Medigap overview

Medigap plans help cover costs Original Medicare does not, but they vary by coverage and price. Learn how to choose the right policy for your needs.

Last Updated: abril 4, 2025

Medigaps are health insurance policies that offer standardized benefits to work with Original Medicare (not with Medicare Advantage). They are sold by private insurance companies. If you have a Medigap, it pays part or all of certain remaining costs after Original Medicare Original Medicare, also known as Traditional Medicare, is the fee-for-service health insurance program offered through the federal government, which pays providers directly for the services you receive. Almost all doctors and hospitals in the U.S. accept Original Medicare. pays first. Medigaps may cover outstanding deductibles, coinsurance The coinsurance is the portion of the cost of care you are required to pay after your health insurance pays. Usually, it is a percentage of the approved amount or negotiated amount. In Original Medicare, the coinsurance is usually 20% of Medicare’s assignment. , and copayments. Medigaps may also cover health care costs that Medicare Medicare is the federal government health insurance program that provides health care coverage if you are 65 or older, are under 65 and receive Social Security Disability Insurance (SSDI) for 24 months, begin receiving SSDI due to ALS/Lou Gehrig’s Disease, or have End-Stage Renal Disease (ESRD) no matter your age. You can receive health coverage directly through the federal government (see Original Medicare) or through a private company (see Medicare Advantage). does not cover at all, like care received when travelling abroad. Remember, Medigaps only work with Original Medicare. If you have a Medicare Advantage Medicare Advantage, also known as Part C, Medicare Private Health Plan, or Medicare Managed Care Plan, allows you to get Medicare coverage from a private health plan that contracts with the federal government. All Medicare Advantage Plans must offer at least the same benefits as Original Medicare (Part A and Part B), but can do so with different rules, costs, and coverage restrictions. Plans typically offer Part D drug coverage as part of Medicare Advantage benefits. Medicare Advantage Plans include Health Maintenance Organizations (HMOs), Preferred Provider Organizations (PPOs), Private Fee-for-Service (PFFS) plans, Special Needs Plans (SNPs), and Medicare Medical Savings Accounts (MSAs). Plan, you cannot buy a Medigap.

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[glossary_exclude]Each state offers a State Health Insurance Assistance Program (SHIP), partly funded by the federal government, to give you free counseling and assistance. A SHIP counselor may be available by phone or in person.[/glossary_exclude]

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Depending on where you live and when you became eligible for Medicare, you have up to 10 different Medigap policies to choose from: A, B, C, D, F, G, K, L, M, and N (policies in Wisconsin, Massachusetts, and Minnesota have different names). Each policy offers a different set of standardized benefits, meaning that policies with the same letter name offer the same benefits. However, premiums can vary from company to company.

Note: People eligible for Medicare on or after January 1, 2020 cannot purchase Medigaps that pay for the Part B deductible. This includes Plan C and Plan F. If you became Medicare-eligible before this date, you will still be able to purchase Plan C or Plan F.

Before you buy a Medigap policy, be sure to do your research. Some steps you may wish to take include the following:

  1. Make sure you are eligible to purchase a Medigap. Remember that you can only have a Medigap if you have Original Medicare. If you are enrolled in a Medicare Advantage Plan, Medigaps cannot be sold to you. There may be other Medigap eligibility requirements that apply to you, depending on the state in which you live.
  2. Learn when you have the right to buy a Medigap without restriction. There are federal protections for people over 65 to buy a Medigap in certain situations. Some states have additional protections for individuals under 65 or during other times.
  3. Once you decide you need a Medigap and know you are eligible to enroll, compare the different types of policies that exist. As mentioned above, there are 10 different standardized policies in most states, each covering a different range of Medicare cost-sharing Cost-sharing is the portion of medical care costs that you pay yourself, such as a copayment, coinsurance, or deductible, if you have health insurance coverage. See also: Out-of-Pocket Costs. .
  4. Learn how a Medigap covers prior medical conditions to know if any of your medical costs may be excluded from Medigap coverage. Depending on your circumstances, a Medigap can exclude coverage for prior medical conditions for a limited amount of time.
  5. Find out how Medigap premiums are priced so you can make cost comparisons. It is important to understand the ways that insurers set premiums to find the best deal for you.
  6. Have a list of questions to ask when shopping for a Medigap to remind you what you should consider. Buying a Medigap can be complicated, but using a set of written questions and asking for help when needed can help you stay organized and simplify the process.

If you need further assistance navigating Medigap policies and enrollment, contact your State Health Insurance Assistance Program (SHIP). For additional information on Medigap policies in your state, you can also contact your State Department of Insurance.

Glossary Terms

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