
Medicare Supplement Insurance, also known as Medigap, is an additional insurance policy that can be purchased to help cover out-of-pocket costs associated with Original Medicare (Part A and Part B). Medigap policies are sold by private insurance companies and are designed to supplement the coverage provided by Original Medicare, filling in some of the gaps in coverage. While Medigap can provide significant financial protection, it is important to understand that it does not cover all expenses, and there are certain limitations and exclusions to be aware of. For example, Medigap plans sold after 2005 do not include prescription drug coverage, and enrollees must join a separate Medicare drug plan (Part D) if they require this coverage.
| Characteristics | Values |
|---|---|
| What is Medicare Supplemental Insurance (Medigap)? | Extra insurance that helps pay your share of out-of-pocket costs in Original Medicare. |
| Who can buy it? | Anyone with Original Medicare – Part A (Hospital Insurance) and Part B (Medical Insurance). |
| Who sells it? | Private insurance companies. |
| How many types of plans are there? | 10 types of plans are offered in most states, named by letters: A-D, F, G, and K-N. |
| What is the difference between plans with the same letter sold by different companies? | Price is the only difference. |
| What if I don't buy a Medigap policy within 6 months of getting Part A and Part B? | You may not be able to buy a policy or you may pay more. |
| When can I enroll in a Medigap policy? | During your Medigap Open Enrollment Period, which is a one-time enrollment period. |
| Can I be denied coverage during the Medigap Open Enrollment Period? | No, the insurance company cannot deny you coverage due to pre-existing health problems during this period. |
| What if I want to buy a policy after the Medigap Open Enrollment Period? | You may not be able to buy a policy, or it may cost more. |
| What is Medicare SELECT? | Another type of Medigap policy that you can switch from to a standard Medigap policy within 12 months of purchase. |
| What is special about Medigap policies? | They must follow federal and state laws designed to protect you, and they are "guaranteed renewable," meaning a company cannot cancel or refuse to renew your policy unless you made intentional false statements on your application or didn't pay your premium. |
| Can the insurance company raise my premium? | Yes, but only once a year. |
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What You'll Learn

Medicare Supplement Insurance (Medigap)
Medicare Supplement Insurance, also known as Medigap, is extra insurance that you can buy from a private health insurance company. It helps to pay your share of out-of-pocket costs in Original Medicare (Parts A and B). Medigap policies are available in all 50 states and Washington, D.C., and can provide coverage for deductibles, copays, and coinsurance that are not covered by Parts A and B. Generally, you must have Original Medicare, including Part A (Hospital Insurance) and Part B (Medical Insurance), to buy a Medigap policy.
Medigap plans are sold by private insurance companies and are designed to assist with out-of-pocket costs. These plans are standardized, with the benefits in each plan being the same across different insurance companies. The price is the only difference between policies with the same letter sold by different companies. It is important to note that you must continue paying your Part B premium in addition to a separate premium for Medigap coverage.
Medigap coverage typically has no network limitations and is available anywhere that accepts Medicare. Some Medigap plans also offer coverage for foreign travel emergency services and services outside the U.S. However, Medigap policies generally do not cover long-term care, such as nursing home stays, vision, dental, hearing aids, private-duty nursing, or prescription drugs.
It is recommended to purchase a Medigap policy within six months of enrolling in Part A and Part B to avoid potential issues with eligibility or increased costs. Once enrolled in a Medigap plan, it will renew every year as long as the premiums are paid and the plan is available. If you already have a Medigap policy and are considering changing or dropping it, be sure to understand the specific rules and restrictions associated with making those changes.
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Medigap and Medicare Advantage
Medigap, also known as Medicare Supplement Insurance, is insurance sold by private companies that fills the "gaps" in Original Medicare by covering some out-of-pocket expenses, such as deductibles and copays. Generally, you must have Original Medicare (Part A and Part B) to buy a Medigap policy. You can buy a Medigap policy at any time you have Medicare Part A and Part B, but Medigap insurers in most states can reject you or charge more if you have pre-existing conditions unless you buy during certain times, such as within six months of enrolling in Medicare Part B when you're 65 or older.
Medicare Advantage, also known as Medicare Part C, is an all-in-one alternative to original Medicare offered by private health insurers. It covers the same benefits as Medicare Part A and Part B, but with extras like dental, vision, hearing, and prescription drug coverage. With Medicare Advantage, you generally must get care within the plan's network of providers. You can get a Medicare Advantage plan when you first enrol in Medicare or within two months of losing employer coverage. Otherwise, you'll have to wait until the open enrolment period from October 15 to December 7 for coverage starting in January.
When considering whether to buy a Medigap policy or enrol in a Medicare Advantage plan, you need to decide whether you want to get your main coverage from the federal government through Original Medicare, perhaps supplemented with a private Medigap policy, or from a private insurer through a Medicare Advantage plan.
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Medigap and other insurance
Medicare Supplement Insurance, or Medigap, is an optional add-on that can fill "gaps" in Medicare Part A and Part B. Medigap is extra insurance that you can buy from a private health insurance company to help pay your share of out-of-pocket costs in Original Medicare. Medigap policies are standardized, and in most states, they are named by letters, like Plan G or Plan K. The benefits in each lettered plan are the same, no matter which insurance company sells it. The price is the only difference between policies with the same letter sold by different companies.
Medigap policies supplement your Original Medicare coverage. Medicare Parts A and B comprise basic coverage, while Part D is an optional prescription drug plan. A Medigap policy will supplement this coverage and help pay additional expenses or deductibles. Individuals who choose Medicare Part C, also known as Medicare Advantage, do not need a Medigap Plan. Generally, you need Part A and Part B to buy a Medigap policy. Some Medigap policies offer coverage when you travel outside the U.S. Generally, Medigap policies don’t cover long-term care (like care in a nursing home), vision, dental, hearing aids, private-duty nursing, or prescription drugs. However, some Medigap policies offer coverage for all or part of the expenses that Medicare does not cover, such as long-term care, vision, or dental coverage.
Medigap will help pay for costs that Medicare does not cover. If you are admitted to the hospital, you have 100% hospitalization coverage after the $1,676 annual deductible under Original Medicare Part A in 2025. However, you may owe up to 20% of some other costs, such as anesthesiologist fees. If you are in the hospital for more than 60 days, you will have to pay $419 per day in 2025. There are similar co-payments for long stays in nursing facilities and hospices. Regular doctor visits and outpatient medical care may cost you, too. Your deductible for 2025 is $257, but after that, you’ll pay up to 20% of the Medicare-approved amount for most doctor services. There is no upper limit.
Medigap policies include at least some coverage for Part A and Part B coinsurance and copays. If you use a lot of health care, that coverage could mean big out-of-pocket savings. Unlike many other kinds of insurance, Medicare Part A and Part B don’t have maximum out-of-pocket caps. There’s no limit on what you could owe as copays and coinsurance add up. Buying a Medigap policy is one way to put a cap on your yearly costs. Paying more upfront for premiums could pay off by limiting your future out-of-pocket spending. You can expect to pay $100-$150 per month or more for the most popular Medigap plan, Plan G, when you sign up at age 65.
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Medigap and prescription drugs
Medigap, or Medicare Supplement Insurance, is an additional insurance policy that you can purchase from a private health insurance company. It helps cover your share of out-of-pocket costs for services under Original Medicare Parts A (Hospital Insurance) and Part B (Medical Insurance). Generally, to be eligible to buy a Medigap policy, you must already be enrolled in Original Medicare Parts A and B.
Medigap policies are standardized and named by letters, like Plan G or Plan K, with each lettered plan offering the same benefits regardless of the insurance company. The price is the main differentiator between policies with the same letter sold by different companies. It is important to note that Medigap policies do not typically cover long-term care, vision, dental, hearing aids, private-duty nursing, or prescription drugs.
If you require prescription drug coverage, you will need to join a separate Medicare drug plan, known as Part D. If you already have a Medigap policy and wish to add prescription drug coverage, you can do so by enrolling in a Medicare drug plan. It is important to note that if your Medigap policy and Medicare drug plan are offered by the same company, you may need to make two separate premium payments for your coverage.
Additionally, if you drop your Medigap policy to join a Medicare Advantage Plan, you will have a single 12-month trial period during which you can reinstate your previous Medigap policy if it is still available. If not, you can purchase a different Medigap policy sold by an insurance company in your state. During this transition period, you may also have the opportunity to enroll in a Medicare drug plan.
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Medigap policy renewal
Medicare Supplement Insurance, also known as Medigap, is an extra insurance policy that can be purchased to help cover some of the costs that Medicare doesn't cover. This includes copayments, coinsurance, deductibles, excess medical charges, blood, and medical care when travelling abroad. Medigap policies are standardized and named by letters, like Plan G or Plan K, with each lettered plan offering the same benefits regardless of the insurance company. The price is the only difference between policies with the same letter sold by different companies.
Medigap policies are guaranteed renewable as long as you're paying your premium, either monthly, quarterly, semi-annually, or annually. This means that your insurance company cannot cancel your policy regardless of your health condition. However, it's important to note that you only have one opportunity in most states to enroll in a Medigap policy. The Medigap Open Enrollment Period is six months, beginning the first month you have Medicare Part B and are 65 or older. During this period, you can buy any Medigap policy sold in your state, even if you have health issues. After this enrollment period, you may not be able to buy a Medigap policy, or it may cost more due to past or present health problems.
While you don't have to renew your Medigap plan each year, it's recommended to review your plan annually to ensure it still meets your needs. Medigap plan prices can change, and your life circumstances may also change, impacting your coverage needs. Comparing Medicare Supplement prices and reviewing the different plan options during the Annual Enrollment Period (AEP) from October 15 to December 7 can help you make an informed decision about your coverage.
If you choose to cancel your Medigap policy, you have a 30-day "free look period" to change your mind. During this time, you can test your new Medigap policy while still paying premiums on your old plan. It's important to understand the details of your new plan, as there may be a delay in getting coverage, and some Medigap policies may not cover certain benefits like long-term care, vision, dental, hearing aids, private-duty nursing, or prescription drugs.
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Frequently asked questions
Medicare Supplement Insurance, also known as Medigap, is extra insurance that you can buy from a private insurance company to help pay your share of out-of-pocket costs in Original Medicare.
Yes, generally, you must have Original Medicare (Part A and Part B) to buy a Medigap policy.
The best time to buy a Medigap policy is during the Medigap Open Enrollment Period, which is a one-time, 6-month period that starts the first month you have Medicare Part B and you're 65 or older. During this time, you can enroll in any Medigap policy, and the insurance company cannot deny you coverage due to pre-existing health problems.
There are 10 different types of Medigap plans offered in most states, named by letters: A-D, F, G, and K-N. The price is the only difference between plans with the same letter sold by different insurance companies. In some states, you may also be able to buy a Medigap policy called Medicare SELECT.
Medigap helps pay your share of out-of-pocket costs in Original Medicare. However, it does not cover long-term care, vision, dental, hearing aids, private-duty nursing, or prescription drugs.







































