The 6 Best Medicare Supplement Plans in 2021

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  • Which Medicare Supplement Insurance plan is best in 2021? Depending on what type of health care costs you expect this year and the types of monthly costs you want to pay, our Medigap plans review can help you decide on the type Medigap plan that’s right for you.

With 10 standardized types of Medicare Supplement Insurance plans available in most states, it’s common for shoppers to wonder which one is best. 

The trouble is, everyone has their own interpretation of what constitutes the “best” plan. Is it the benefits? Cost? Something else? 

We’ve compiled a list of the best Medicare Supplement Insurance plans according to various criteria to help consumers like you navigate your way through the landscape.

It’s important to remember that Medicare Supplement Insurance (also called Medigap) is standardized by the federal government, meaning the coverage is consistent within each plan no matter where or by whom it is sold. In other words, Medigap Plan B sold by Company 1 in New York offers the same benefits as Medigap Plan B sold by Company 2 in California. 

The chart below shows the 10 different Medicare Supplement Insurance plans available in most states (Massachusetts, Minnesota and Wisconsin standardize their plans differently) and the combination of benefits offered by each.  

Medicare Supplement Insurance Plans 2021
Medicare Supplement Benefits A B C1 D F1 G K L M N
Part A coinsurance and hospital costs
Part B coinsurance or copayment 50% 75%
First 3 pints of blood 50% 75%
Part A hospice care co-insurance or co-payment 50% 75%
Co-insurance for skilled nursing facility     50% 75%
Medicare Part A deductible   50% 75% 50%
Medicare Part B deductible                
Medicare Part B excess charges                
Foreign travel emergency     80% 80% 80% 80%     80% 80%
1. Plans C and F are not available to new beneficiaries who became eligible for Medicare on or after January 1, 2020.
2. Plans F and G also offer a high deductible plan which has an annual deductible of $2,370 in 2021. Once the annual deductible is met, the plan pays 100% of covered services for the rest of the year. The high deductible Plan F is not available to new beneficiaries who became eligible for Medicare on or after January 1, 2020.
3. Plan K has an out-of-pocket yearly limit of $6,220 in 2021. Plan L has an out-of-pocket yearly limit of $3,110 in 2021.
4. Plan N pays 100% of the Part B coinsurance, except for a copayment of up to $20 for some office visits and up to $50 for emergency room visits that don’t result in an inpatient admission.
View an image version of this table.

Best Medicare Supplement Plan for Coverage

As you can see by the chart above, there is one Medicare Supplement plan that stands above the rest when it comes to the benefits offered. 

Plan F is the only Medigap plan to offer coverage in each of the nine benefit areas offered by this type of insurance. Members of Plan F enjoy little to no out-of-pocket expenses because their Medigap plan picks up nearly all health care costs not paid for by Original Medicare (Medicare Part A and Part B). More than half of all Medigap beneficiaries are enrolled in Plan F. 

However, Plan F does come with one downside. Federal legislation has made Plan F off-limits to anyone who first became eligible for Medicare on or after January 1, 2020. Only those who became eligible for Medicare before that date may enroll in Plan F. Because of that rule, we can expect to see Plan F enrollment decrease every year until it eventually no longer exists. 

Medigap Plan C is the only other type of Medigap plan that is subject to the same enrollment rule as Plan F. If you were eligible for Medicare before 2020, you may still be able to enroll in Plan F or Plan C if either plan is available where you live.

Best Medicare Supplement Plan for New Enrollees

Because of the enrollment rules tied to Plan F, new enrollees are barred from enrolling in that popular plan. So what’s the best Medigap plan for someone who became eligible for Medicare after Jan. 1, 2020?

Plan G offers all of the same benefits as Plan F except that it doesn’t pay for the Medicare Part B deductible. The Part B deductible is $203 per year in 2021, so it’s a relatively small cost requirement when compared to some other types of Medicare out-of-pocket copays and deductibles. And the monthly premiums for Plan G are typically lower than those of Plan F, which can more or less cancel out the Part B deductible cost. 

Plan D is another candidate for the best Medigap plan for new enrollees. Plan D offers the same coverage as Plan G with the exception of Medicare Part B excess charges. However, excess charges can usually be avoided simply by making sure to only visit health care providers who accept Medicare assignment. 

Best Medicare Supplement Plan for Basic Benefits 

Some beneficiaries just want a basic Medigap plan with no thrills. Medigap Plan B checks that box, with coverage for three types of out-of-pocket Medicare costs that Medicare beneficiaries may be more likely to face that can add up quickly: 

  • Medicare Part A deductible
  • Medicare Part A coinsurance
  • Medicare Part B coinsurance

Having those three areas covered means you will likely avoid some of the biggest potential Medicare charges you could face. This can help many beneficiaries enjoy some peace of mind with a simple plan that has everything they need and nothing they don’t.  

Best Medicare Supplement Plan for Cost

Cost is always important when shopping for health insurance, and some consumers will even place it as their top priority. 

High-deductible Plan G and high-deductible Plan F are typically the two lowest-cost Medigap plans available. Each of these plans requires beneficiaries to meet an annual deductible before the Medigap plan coverage kicks in. In 2021, the deductible for high-deductible Plan F and high-deductible Plan G is $2,370.

This means that in exchange for a much lower monthly premium, you agree to pay up to $2,370 in 2021 for your covered services before your Medigap plan will cover most the rest of your out-of-pocket Medicare costs for the rest of the year.

Either of these plans can be a good fit for a beneficiary who doesn’t expect to use many medical services during the year and who wants to save money each month on their Medigap premiums.

Plan N is also a good plan to consider if you want a plan with lower monthly premiums. Plan N pays for most out-of-pocket Medicare costs, including 100% of your Medicare Part B coinsurance costs. The main exception is that you pay a copay of up to $20 for some of your doctor’s office visits and a copay of up to $50 if you visit the emergency room but aren’t admitted to the hospital for inpatient care.

These low – but predictable – copays allow insurance companies to typically offer Plan N at a lower monthly rate than some other Medigap plans.

Best Medicare Supplement Plan for Travelers 

One of the health care costs that can be covered by some Medicare Supplement Insurance plans is foreign travel emergency care, or emergency care received outside of the U.S. or U.S. territories. 

There are 6 Medigap plans that will pay for 80% of your foreign travel emergency care costs. Two of those plans are Plan M and Plan N, which provide coverage of foreign emergency care while typically offering lower monthly premiums than the other types of Medigap plans that also offer this coverage. 

Plus, these plans also offer coverage for Medicare Part B excess charges, which allows members to see a greater variety of health care providers within the U.S. and U.S. territories. 

Best Medicare Supplement Plan for Budgeters

Surprise or unexpected medical bills can ruin anyone’s budget. But Medigap Plan K and Plan L have annual out-of-pocket limits built into them to give beneficiaries an extra layer of protection. 

For 2021, Plan L’s out-of-pocket spending limit is $3,110, and Plan K’s limit is $6,220. Once a plan member spends that amount on covered care, the plan then pays for 100% of all covered services and items for the remainder of the year. 

Original Medicare does not include an out-of-pocket limit, which leaves beneficiaries exposed to potentially high medical bills for more serious injuries or illnesses. 

How to Choose a Medicare Supplement Insurance Plan

Everyone has different health care needs and spending concerns, so deciding on the best Medicare Supplement Insurance plan for you requires assessing your own personal situation. 

It can be helpful to make note of which type of care you spend the most money on to determine where your biggest savings opportunity might lie. Some questions to ask of yourself include:

  • Do you travel frequently within or outside the U.S.?
  • Were you eligible for Medicare before January 1, 2020 (even if you were not yet enrolled)?
  • Do you have a monthly budget in mind?
  • How often do you see a doctor?

Not every plan is available in every location, so the best plan for you is really the best available plan for you.

Working with a licensed insurance agent can be a good way to determine the best Medigap plan for your needs.

What Are the Best Medicare Supplement Insurance Companies?

Ranking the top 10 Medicare Supplement Insurance companies can be difficult for two reasons.

  • First, Medicare Supplement plans – also called Medigap – offer benefits that are standardized in every state except for Massachusetts, Minnesota and Wisconsin. This means each company’s plans pay for the same out-of-pocket Medicare costs as the same types of Medigap plans sold by other companies.

  • Second, Medicare Supplement plan prices and plan selection can fluctuate from one company to another and from one location to the next, so the “top” company in one city or state might be different from the top company in another location. 

With all that said, we’ve compiled a list below of 10 Medicare Supplement Insurance companies that all meet the following criteria:

  • Serve a high number of beneficiaries
  • Sell plans in most states
  • Offer a diverse selection of plans

Any company that can check all 3 of those boxes should be considered among the top Medigap companies in the U.S. So without further ado, here are 10 of the top Medicare Supplement Insurance companies (in no particular order).  



UnitedHealthcare is one of the top two largest insurance companies in the world.1 The company offers 9 of the 10 standardized Medigap plans that are available in most states, including the popular Plan F and Plan G.

UnitedHealthcare provides Medicare Supplement Insurance plans through a partnership with AARP, making the company a trusted source of coverage for millions of older adults.  

Anthem Blue Cross Blue Shield

Anthem BCBS logo

Anthem Blue Cross Blue Shield and their associated family of brands offer 7 different Medigap plans in various locations throughout the U.S., and as one of the nation’s largest health insurers, beneficiaries have access to the plans nearly everywhere.

Blue Cross Blue Shield is one of the most recognized brands in the insurance industry with Medicare Supplement plans that are accepted by any doctor, hospital and provider who accepts Medicare.


Aetna logo

Aetna sells 7 Medigap plans and serves customers in 44 states. Aetna is among the oldest health insurance companies around, with a long history of satisfied customers.

Aetna recently merged with CVS Health, so plan members can pair an Aetna Medigap plan with an Aetna Part D prescription drug plan to utilize one of the largest pharmacy networks in the U.S.


Humana logo

Humana has a consistent model for its Medigap policies, selling the same 8 plans across 47 states.

Humana offers some additional perks to its Medigap plan members in certain markets, such as memberships to fitness clubs and discounts on prescription drugs and other products and services.


Cigna logo

Cigna’s discount offers can help beneficiaries enroll in Medigap plans at affordable premiums.

The company offers 4 different Medigap plans, and the selection is diverse enough to offer something for just about everyone. Cigna also has multiple mobile apps for the more digitally savvy seniors, which can help with everything from checking on the status of a Medicare claim to paying monthly premiums.

Cigna has been in business since 1792, making it an easy company to trust. 

Mutual of Omaha

Mutual of Omaha logo

Mutual of Omaha offers 3 Medigap plans, and all 3 options are among the more popular plans around, and the company sells policies in all 50 states and Washington D.C.

Mutual of Omaha has been in the Medicare market since Medicare was first established, and because the company also sells other types of policies such as life insurance and long-term care coverage, members can benefit from a more bundled approach. 

Manhattan Life

Manhattan Life logo

Manhattan Life sells 5 Medicare Supplement Insurance plans, including the popular Plan F, Plan C and Plan G. The company also sells a variety of other insurance products, including a dental, vision and hearing package that can be paired with a Medigap plan to give you some extra benefits that Original Medicare (Medicare Part A and Part B) doesn’t typically cover.

Bankers Fidelity

Bankers Fidelity logo

Bankers Fidelity is unique because unlike the other insurance companies on this list, all of Bankers Fidelity insurance plans are designed specifically for seniors. Many consumers like the senior-focused style of Bankers Fidelity in addition to the 8 Medigap plans offered by the company.


Transamerica logo

Transamerica employs close to 8,000 people in the Americas is over 100 years old.

Transamerica Medicare Supplement plans are sold by Transamerica Life Insurance Company, which maintains strong credit and financial ratings from A.M. Best, Fitch, Moody’s and S&P Global. 


Medico logo

Medico offers 4 Medigap plans serving beneficiaries in 25 states, with a number of various discounts that may be available depending on where you live. The company supplements its Medigap selection with a lineup of related products such as short-term care insurance, hospital indemnity insurance and more. 

Choosing a Medicare Supplement Insurance Company

Not every insurance company sells Medicare Supplement Insurance in every state. And even each company’s plan selection can vary within the states it does serve. Choosing a Medicare Supplement Insurance company begins with choosing one that serves the area in which you live. 

After identifying which companies sell plans in your location, the next step is to determine which Medigap plan is right for your needs. Learn the benefits of each type of plan and decide where you need the most coverage.  

Next, compare prices. One company’s Plan G might cost more than another company’s Plan G despite the two options both offering the same coverage. Also be sure to check out any discounts available from each company. 

Lastly, consider factors such as an insurance company’s financial strength ratings, customer service reviews and overall reputation to ensure you can trust them with your business.  

Working with a licensed insurance agent or Medicare insurance broker can also help you sort through your options and answer your questions before guiding you through the enrollment process once you find a plan you like.

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