Medicare Supplement Plan F: Coverage and Eligibility

Medicare Supplement Plan F is a Medigap policy that helps pay certain out-of-pocket costs left by Original Medicare, including Part A and Part B deductibles. It supplements Medicare rather than replacing it. Availability, however, depends on when a person became eligible for Medicare and on the options offered in their state.

Talk through your Medicare Supplement options with Grey State Financial at (424) 348-3637.

Medicare supplement plan f generally covers Part A and Part B deductibles, coinsurance, and other standardized benefits. People new to Medicare on or after January 1, 2020 generally cannot buy it. But some who were eligible before that date may still be able to, even if they enrolled later. Part B enrollment and availability from an insurer in your state also matter. Medicare.gov explains the coverage and eligibility rules.

The useful first step is to understand which expenses Plan F can help pay and which remain governed by Original Medicare. With that distinction in mind, its benefit categories are easier to compare.

What Does Medicare Supplement Plan F Cover?

Medicare Supplement Plan F, also called Medigap Plan F, works alongside Original Medicare. Medicare processes a covered service first, and the supplement helps pay certain out-of-pocket costs according to the plan's standardized benefits. Plan F is not a Medicare Advantage plan: it does not replace Original Medicare with a private plan structure. The two are different ways of arranging Medicare coverage.

Medicare.gov lists several covered cost-sharing categories. The chart includes the following benefits for eligible buyers:

• Part A hospital coinsurance and covered hospital costs for up to 365 additional days after Medicare benefits are used.
• Part B coinsurance or copayments, plus the Part A and Part B deductibles.
• The first three pints of blood, Part A hospice coinsurance or copayments, and skilled nursing facility care coinsurance.
• Part B excess charges, which may apply when a provider's charge is higher than the Medicare-approved amount and the provider is allowed to bill the difference.

The chart also shows an 80% benefit for foreign travel emergency care, subject to plan limits. These benefits do not mean that every service is covered or that all costs disappear. The service must fall within Medicare's coverage rules, and the policy pays according to its terms. In particular, Medigap generally pays coinsurance after the applicable Medicare deductible has been met, unless the policy also covers that deductible. Plan F is listed as covering both the Part A and Part B deductibles for eligible buyers.

That distinction matters when estimating what a policy may pay. Plan F helps with specified cost-sharing for Medicare-covered care. It does not expand the list of services Original Medicare covers. Actual claims still depend on Medicare coverage and the policy provisions. Review the chart's footnotes, especially for foreign travel benefits with stated limits.

Plan F's standardized benefit design makes it easier to compare coverage categories, but it does not make every policy or availability decision identical. The plan letter describes benefits, while eligibility and local offerings still matter. For broader background on how supplements work alongside Original Medicare, see Grey State Financial's Medicare Supplement plan options.

Review the official Medicare.gov Medigap benefit comparison chart for the complete standardized comparison and important eligibility notes.

Who Can Still Enroll in Medicare Supplement Plan F?

Eligibility depends on when you first qualified for Medicare, not simply your age today. Federal rules generally prevent people who became newly eligible on or after January 1, 2020, from buying Plan F. Medicare's definition also considers when Part A began. For this rule, a person is new to Medicare if they turned 65 on or after January 1, 2020, and Part A began on or after that date. Some people under 65 also cannot buy Plan F. See Medicare's guide to choosing a Medigap policy for the eligibility definition.

The cutoff does not mean everyone now older than 65 can enroll. It depends on the date you became eligible. If that was before January 1, 2020, you might still be able to buy Plan F, even if you did not enroll then. Medicare uses qualified language because earlier eligibility does not guarantee that a company will accept your application. The plan also must be offered in your location. Check your Medicare eligibility and enrollment dates, not your current age alone. Medicare's benefit comparison explains the cutoff and exception.

There is also a basic enrollment requirement: you must be enrolled in Medicare Part B before you can buy any Medigap policy, including Plan F. If Part B has not started, you cannot purchase a Medigap plan yet. Medicare explains this requirement and the timing rules on its Medigap enrollment page.

Even when your eligibility dates appear to meet the federal rule, Plan F availability is not universal. State laws may give people additional buying opportunities, and federal law does not require insurance companies to sell Medigap policies to people under 65. Individual insurers and states can vary in which plans they offer. As a result. Someone may qualify under the federal cutoff but still need to confirm that Plan F is sold in their state and is available from a company to which they can apply. Do not treat eligibility as a promise of acceptance or enrollment. Review the relevant state rules and current company offerings before making a decision.

For a useful first check, gather the date you became eligible for Medicare, when Part A began, and your Part B enrollment status. Those details provide a more reliable starting point than age by itself, but a state-specific review is still needed to understand your options.

How Does Plan F Compare With Plan G and Other Options?

Plan F, Plan G, and Plan D share many standardized benefits, but they are not identical. The clearest difference is how they treat the Part B deductible. Plan F covers it for eligible buyers; Plans G and D do not. Plan F and G also cover Part B excess charges. Plan D does not. Review the chart rather than assume a plan covers every cost.

These are standardized benefits, not a promise that every insurer sells each plan in every location. See the official Medicare.gov Medigap benefit chart for the full comparison. Your eligibility and local availability also matter.

For someone who can buy either plan, Plan G leaves the Part B deductible to the enrollee, while Plan F covers it. This may affect how you prefer to handle costs, but it does not decide which option fits best. Compare the benefits and premiums of plans actually available to you.

How high-deductible Plan F works

High-deductible Plan F is a separate version. Its 2026 deductible is set by the Centers for Medicare & Medicaid Services. You pay eligible out-of-pocket costs up to the annual threshold before benefits begin. Premiums do not count toward it. See the CMS deductible announcement for the current amount, then consider how the threshold and policy premium fit your needs.

Plan D and Plan G are alternatives for people who cannot buy Plans C or F under the post-2020 eligibility rules. Both leave the Part B deductible uncovered, but Plan D also differs from Plan G on Part B excess charges. See the Medicare publication on choosing a Medigap policy for that distinction and the alternatives described for people new to Medicare. For a broader comparison of Original Medicare with Medigap and Medicare Advantage, see Grey State Financial's Medicare Advantage alternative page.

Is Plan F Worth Keeping if You Already Have It?

If you already have Plan F, the decision is not simply whether it is considered a strong plan. It is whether the coverage you value is worth the premium you pay, given your own health care use, budget, and alternatives. Plan F's broad cost-sharing benefits can make expenses more predictable, but that does not automatically make it the best fit for every policyholder.

Start with your current policy's actual premium and how it has changed over time. Compare that cost with the expenses Plan F may cover under Original Medicare. Consider which covered services you have used. Also consider which costs you could pay yourself with a plan offering less coverage. Do not rely on promised savings or broad claims that another plan costs less. Premiums and policy availability depend on individual and location-specific factors.

Next, check which alternatives are available to you now. Plan F eligibility depends on when you became eligible for Medicare. Switching to another Medigap policy may also depend on federal protections, state rules, and an insurer's application requirements. If you give up Plan F, you may not be able to get it back. Medicare says federal law does not guarantee a sale outside certain protected periods or rights. Review Medicare's guidance on buying, switching, or dropping Medigap. Confirm your state rules before changing coverage.

Before cancelling, ask about a new policy's effective date, benefits, premium, and underwriting. Do not end existing coverage until you know the replacement is approved and when it will begin. Compare your current Plan F with a specific alternative. Weigh predictable cost-sharing against the premium without assuming one option suits everyone.

When Can You Buy Plan F Without Medical Underwriting?

The main federal opportunity is your six-month Medigap Open Enrollment Period. It begins on the first day of the month you are both at least 65 and enrolled in Medicare Part B. During this window, insurers cannot use medical underwriting to decide whether to sell you a Medigap policy. You must have Part B to buy Medigap. Medicare explains when Medigap enrollment rights apply.

This window is tied to your Part B start, not the annual period when people review other Medicare coverage. If you delay Part B because you have employer coverage, your Medigap Open Enrollment Period generally starts when you enroll in Part B. Check the timing before making changes to employer coverage or Medicare enrollment.

Open enrollment protections do not make every lettered plan available. Plan F has a separate eligibility restriction. People new to Medicare on or after January 1, 2020, generally cannot buy it. Some people eligible before that date but not yet enrolled may still qualify. So you may have a Medigap enrollment right but need to confirm Plan F eligibility. See Medicare's Plan F guidance.

After the six-month period, federal law does not guarantee that an insurer will sell you a Medigap policy. If you do not have a guaranteed-issue right, an insurer may use medical underwriting or charge a different premium, depending on applicable rules. Guaranteed-issue rights protect people in certain circumstances, but they are not an open-ended enrollment period and may apply only to particular policies. Confirm the details and deadlines for your situation with Medicare's guide to buying Medigap.

State law may provide additional opportunities or protections beyond federal rights. Rules vary, so check with your state insurance department or State Health Insurance Assistance Program (SHIP) rather than assuming that a rule in another state applies to you. Federal law also does not require insurers to sell Medigap to people under 65, though some states allow it. Even when a state offers broader access, Plan F availability and eligibility still need to be verified.

Medicare Advantage enrollment is different. Its annual election period is for choices involving Medicare Advantage and prescription drug coverage. It does not guarantee acceptance for Medigap Plan F without underwriting. Some Medicare Advantage situations can create Medigap rights. These are specific circumstances, not a general result of the annual election period. Review your dates and state protections before leaving a plan or applying for Plan F.

What Should You Check Before Choosing Plan F?

Use this checklist before comparing applications or changing coverage. A quote is useful only if you are eligible to buy the policy and it fits your needs.

• Confirm eligibility. Plan F is not available to people new to Medicare on or after January 1. 2020, though some who were eligible before that date may still be able to buy it. You must have Part B before buying Medigap. Check your enrollment history, not just your age. Medicare's eligibility guidance explains the cutoff.
• Check local availability. Ask whether an insurer sells Plan F in your state and accepts applicants with your circumstances. Plan letters are standardized in most states, but that does not guarantee each plan is sold in every location. Massachusetts, Minnesota, and Wisconsin use different standardization approaches.
• Understand enrollment rights and underwriting. Find out whether you are in your Medigap Open Enrollment Period or have a guaranteed-issue right, and whether medical underwriting applies. State law may provide additional opportunities. Review Medicare's buying-rights guidance and confirm your protections before applying.
• Compare the actual premium with benefits you value. Request the premium for the specific policy available to you, then weigh its ongoing cost against your expected needs and budget. Premiums vary by insurer, plan, and location, so another person's quote may not apply. Compare benefits with Medicare's chart.
• Verify provider participation. Check that the doctors and hospitals you expect to use accept Medicare. Medigap helps pay eligible cost-sharing for covered Original Medicare services; it does not make a provider who does not accept Medicare participate.

For impartial help, contact your State Health Insurance Assistance Program (SHIP). Medicare's Choosing a Medigap Policy guide points readers to shiphelp.org and Medicare's policy-finder resources. A counselor can explain state-specific rights and questions to ask insurers.

Grey State Financial LLC is not connected with or endorsed by the U.S. government or the federal Medicare program.

Talk through your Medicare Supplement options with Grey State Financial at (424) 348-3637.

Frequently Asked Questions

Is Medicare Supplement Plan F being phased out?

Plan F was closed to people who became newly eligible for Medicare on or after January 1, 2020, but people who already have it can keep their policy. Some people who were eligible before that date but had not enrolled may still be able to buy it. Depending on their circumstances and what is offered where they live. Medicare explains the eligibility rules.

How much does Plan F cost per month?

There is no single monthly price. Premiums vary by insurer, plan, and location, and you pay the Medigap premium in addition to your Part B premium. Compare current quotes for the same type of Plan F in your area, and check how the premium is set and may change over time. Medicare describes factors that affect Medigap costs.

What are the disadvantages of Plan F?

Plan F's broad cost-sharing coverage can come with a premium that may not fit every budget. It is also unavailable to many people newly eligible for Medicare since 2020, and a Medigap policy does not replace Original Medicare. Compare its premium and benefits with plans available to you rather than assuming the most comprehensive coverage is automatically the best value.

Is Plan F worth keeping if I already have it?

It may be, but the answer depends on your premium, budget, health coverage priorities, and available alternatives. Medicare says people who already have Plan F can keep it. Before switching, compare the benefits and total ongoing costs, and confirm whether you could return to Plan F later. Do not cancel until replacement coverage is approved and its effective date is clear. Read Medicare's Medigap guidance.

Who is eligible to buy Plan F now?

Eligibility generally turns on when you became eligible for Medicare, not just your current age. People new to Medicare on or after January 1, 2020 cannot buy Plan F, while some who were eligible before then may still qualify. You must also have Part B to buy Medigap, and state and insurer availability can vary. Review Medicare's buying rules and verify your situation locally.

For help reviewing Medicare Supplement eligibility and options, contact Grey State Financial.