Choosing the Best Medigap Plan: What You Really Need to Know

If you’re asking, “What is the best Medigap plan?”, you’re not alone. Many people approaching or already on Medicare feel overwhelmed by the alphabet soup of Medigap (Medicare Supplement) plans: Plan A, B, D, G, K, L, M, N… and more.

The honest answer:
👉 There is no single “best” Medigap plan for everyone.
There is a best Medigap plan for you, based on your health needs, budget, and preferences.

This guide breaks down what Medigap is, how the main plans differ, which plans are most popular, and how to decide which one truly fits you.

Medigap Basics: What These Plans Actually Do

Medigap (also called Medicare Supplement Insurance) is optional coverage sold by private insurers to help pay some of the out-of-pocket costs that Original Medicare (Part A and Part B) does not fully cover, such as:

• Part A and Part B deductibles
• Coinsurance and copayments
• Certain extra days in the hospital
• Limited foreign travel emergency care (with some plans)

Key points about Medigap:

• It only works with Original Medicare, not Medicare Advantage.
• Medigap plans are standardized in most states.
  That means a Plan G from one insurer must provide the same core benefits as a Plan G from another insurer, although prices and service can differ.
• You must have Medicare Part A and Part B to enroll in Medigap.
• You generally pay a monthly premium to the Medigap insurer, in addition to your Part B premium.

What Does “Best Medigap Plan” Really Mean?

“Best” can mean different things:

• Most coverage: You want to pay the least at the doctor or hospital, even if your monthly premium is higher.
• Best value: You’re willing to pay some costs out of pocket to keep the premium moderate.
• Lowest monthly premium: You want to minimize monthly expenses, even if it means more risk of bills later.
• Simplicity and predictability: You prefer to know that most costs will be covered.

Because people weigh these priorities differently, the best Medigap plan varies from person to person.

Still, certain plans tend to stand out as common favorites. Let’s walk through them.

Overview of the Main Medigap Plans

Medigap plans are labeled with letters, and each offers a different combination of benefits. The most commonly discussed are:

• Plan G
• Plan N
• Plan F (only for those first eligible for Medicare before 2020)
• Plans with higher cost-sharing, like Plan K and Plan L

Here’s a simplified comparison of some key benefits:

*Plan F is not available to people newly eligible for Medicare on or after January 1, 2020.
**Plan N may have copays for some doctor and ER visits and does not cover Part B excess charges.

Medigap Plan G: Often Considered the Most Comprehensive for New Enrollees

For people who are new to Medicare, Medigap Plan G is often seen as one of the most robust options available.

What Plan G Typically Covers

Plan G usually:

• Covers virtually all of the gaps in Original Medicare except the Part B deductible.
• Helps pay:
  • Part A and Part B coinsurance
  • Part A deductible
  • Skilled nursing facility coinsurance
  • Hospice coinsurance or copayment
  • Part B excess charges (where allowed)
  • Limited foreign travel emergency care

With Plan G, once you pay the Part B deductible each year, you may have little or no further out-of-pocket costs for Medicare-approved services, depending on how you use care.

Who Might Find Plan G “Best”?

Plan G may appeal to people who:

• Want very broad protection against unexpected bills
• Prefer predictable costs and fewer surprise charges
• See doctors who may bill Part B excess charges
• Use specialists or expect frequent healthcare visits

The tradeoff: Plan G premiums are generally higher than some other options, in exchange for its more complete coverage.

Medigap Plan N: Strong Coverage With Lower Premiums and Some Copays

Medigap Plan N is another very popular option, often chosen by people who want solid coverage at a lower monthly cost than Plan G.

What Plan N Typically Covers

Plan N generally:

• Covers:
  • Part A coinsurance and hospital costs
  • Part A deductible
  • Many Part B coinsurance amounts
  • Skilled nursing facility coinsurance
  • Limited foreign travel emergency care
• Does not cover:
  • Part B deductible
  • Part B excess charges
• Often includes:
  • A copay for some office visits
  • A copay for some emergency room visits (if not admitted)

Who Might Find Plan N “Best”?

Plan N may be attractive if you:

• Want a lower premium than Plan G
• Don’t mind small copays for doctor or ER visits
• Are comfortable avoiding providers who bill Part B excess charges, where possible
• Don’t have frequent, complex healthcare needs

For those with relatively average or lower medical usage, Plan N can offer a balance of coverage and savings.

Medigap Plan F: The Most Complete, But Only for Some People

Medigap Plan F is often described as offering the most comprehensive coverage, because it typically covers:

• Part A and Part B deductibles
• Most or all coinsurance and copayments
• Part B excess charges
• Limited foreign travel emergency care

Many people with Plan F have very minimal out-of-pocket costs for Medicare-covered services.

However:

• Plan F is not available to people who became newly eligible for Medicare on or after January 1, 2020.
• If you were eligible for Medicare before that date, you may still be able to buy or keep a Plan F.

Who Might Find Plan F “Best”?

If you qualify and can enroll, Plan F may be preferred by those who:

• Strongly value maximum coverage and simplicity
• Want to avoid nearly all cost-sharing
• Don’t mind paying a higher premium for that peace of mind

Plans K, L, M, and Others: Lower Premiums, More Cost-Sharing

Some Medigap plans are designed to have lower monthly premiums in exchange for higher cost-sharing.

Plan K and Plan L

• Cover a percentage (not all) of certain costs:
  • Plan K generally pays 50% of many covered gaps.
  • Plan L generally pays 75% of many covered gaps.
• Include an annual out-of-pocket limit.
  Once your covered out-of-pocket costs reach that limit in a year, the plan usually pays 100% of covered services for the rest of the year.

These plans may suit people who:

• Want to keep premiums lower
• Can handle unpredictable bills during the year
• Like the idea of a financial safety cap on their out-of-pocket costs

Other Lettered Plans

Plans like A, B, D, and M exist but are generally less commonly chosen, often because more popular options (like G and N) offer broader or more balanced coverage.

How to Decide Which Medigap Plan Is Best for You

Instead of asking, “Which Medigap plan is best overall?”, it’s more helpful to ask:

👉 “Which Medigap plan best matches my health needs, risk comfort, and budget?”

Here’s a step-by-step way to think it through.

1. Evaluate How Much Medical Care You Typically Use

Ask yourself:

• Do you see doctors frequently, or only a few times a year?
• Do you see several specialists?
• Have you had hospital stays or expect surgeries?
• Do you travel out of the country?

If you expect frequent use of healthcare services, a more comprehensive plan like G (or F, if eligible) may feel more comfortable.
If your use is low and your budget is tight, N, K, or L might be worth exploring.

2. Consider Your Budget and Cash-Flow Comfort

Think about:

• How much can you reasonably afford for a monthly premium?
• Would higher premiums with fewer surprise bills reduce stress?
• Or would you rather keep the premium low and accept some risk of higher out-of-pocket costs?

In general:

• If you want predictable costs, you may lean toward Plan G (or F if available).
• If you want to save on premiums and don’t mind copays, Plan N can be appealing.
• If you’re comfortable sharing more costs to get low premiums, you might consider Plan K or L.

3. Think About Provider Choice and Excess Charges

Some doctors may charge up to a limited amount above the Medicare-approved rate, known as Part B excess charges (in states where this is allowed).

• Plans G and F cover these excess charges.
• Plan N and many other plans do not.

If it’s important for you to see any provider who accepts Medicare, without worrying about excess charges, Plan G or F might feel more secure.

If you:

• Are willing to avoid providers who bill excess charges, or
• Live in a state that restricts or prohibits excess charges,

then the lack of this coverage on Plan N might not be a major issue for you.

4. Factor in Travel Habits

Many Medigap plans include limited foreign travel emergency coverage.

• If you travel internationally, plans such as G, N, or F may be more attractive.
• If you rarely or never travel outside the U.S., this may be less important.

5. Understand Enrollment Timing and Underwriting

Your ability to choose freely among Medigap plans can depend on when you enroll:

• The Medigap Open Enrollment Period usually starts when you are 65 or older and enrolled in Part B, and lasts for 6 months.
• During this period, you generally:
  • Can buy any Medigap plan offered in your state
  • Cannot be charged more or denied based on health conditions

After this period, in many cases:

• You may be subject to medical underwriting
• You could be denied coverage or charged a higher premium based on health factors

Because of this, many people aim to enroll in their preferred Medigap plan during their initial Medigap enrollment window if possible.

Quick Guide: Which Medigap Plan Often Fits Which Priority?

Use this as a starting point, not a final decision:

• 🛡️ “I want the most comprehensive coverage available to me.”

  • If eligible: Plan F is often considered the most complete.
  • If newly eligible after 2020: Plan G is commonly the most comprehensive.

• 💵 “I want good coverage but need a lower premium.”

  • Plan N is often viewed as a strong balance of cost and benefits.

• 📉 “I want the lowest premium and can take on more risk.”

  • Plan K or Plan L may be options, with higher cost-sharing but an annual out-of-pocket cap.

• ✈️ “I travel internationally and want some emergency coverage.”

  • Plans like G, N, and F often include limited foreign travel emergency benefits.

Common Mistakes to Avoid When Choosing a Medigap Plan

To find the best Medigap plan for you, it helps to avoid a few frequent pitfalls:

1. Choosing solely on premium price
   A low monthly premium can be appealing, but if it comes with high copays, deductibles, or gaps that don’t fit your health needs, you may end up paying more in the long run.

2. Ignoring how standardized benefits work
   A Plan G is Plan G, regardless of insurer, in most states. Differences are usually in price, customer service, and company policies, not in the basic covered benefits.

3. Waiting too long to enroll
   If you miss your initial Medigap enrollment window, your choices later could be limited or more expensive, depending on your health and your state’s rules.

4. Forgetting to consider future health needs
   While no one can predict the future, thinking only about today’s health can lead to being underinsured later. Some people prefer more robust coverage today to guard against tomorrow’s surprises.

Key Takeaways: There’s No One “Best” Medigap Plan

To summarize the main points:

• There is no single best Medigap plan for everyone.
  The “best” plan depends on your personal health, financial situation, and risk tolerance.

• For many new Medicare enrollees:

  • Plan G is often favored for comprehensive coverage.
  • Plan N is often chosen for a balance of value and protection.
  • Plan F may be the most complete, but only for those eligible for Medicare before 2020.

• Plans like K and L may work for people who want lower premiums and can accept more cost-sharing, with the protection of an annual out-of-pocket limit.

• Your enrollment timing, doctor preferences, travel habits, and budget all play major roles in determining which Medigap plan is truly best for you.

By focusing on your own needs and understanding how the different Medigap plans work, you can choose a plan that gives you the right mix of coverage, cost, and peace of mind.