What Are the Best Medicare Supplement Insurance Companies?

Rating Medicare supplement plans and 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 among Medicare supplemental insurance companies and even from one location to the next, so the “top” company in one city or state might be different from the top Medicare Supplement company in another location. 

You can compare plans from several different insurance companies online so that you can find the right plan for the best price in your area. You can also call a licensed insurance agent who can help you with your Medicare Supplement review for free, and they may be able to help you enroll in the Medicare plan you want, if you're eligible. 

With all that said, we’ve compiled a list below of 10 Medicare Supplement Insurance companies ratings 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 the 10 best Supplemental Insurance companies (listed in no particular order).

Mutual of Omaha

Visit MutualOfOmahaMedicarePlans.com

What’s notable: Domestic partners can get a 7% or 12% discount on Medigap plans in most states.¹

Mutual of Omaha offers 3 Medigap plans, and all 3 options are among the more popular plans around – Plan F, Plan G and Plan N account for 83% of all Medigap enrollment.²

Mutual of Omaha has been in the Medicare market since Medicare was first established and sells policies in all 50 states and Washington D.C.

Because the company also sells other types of policies such as life insurance and long-term care coverage, members may be able to benefit from a more bundled approach to their insurance products.

Aetna

Visit Aetna-MedicarePlans.com

What’s notable: Aetna currently offers its members two different mobile/smartphone/tablet apps.

• The Aetna Health^SM app helps enrollees manage their coverage⁴
• The Attain by Aetna^® app helps promote healthy living⁵
  

Aetna sells 7 Medigap plans and serves customers in 44 states. Aetna has a long history, dating all the way back to 1850.⁶ 

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.

Aetna Health Insurance Company, one of several Aetna subsidiaries, does have slightly a slightly higher-than-average rate of customer complaints in 2022, according to the National Association of Insurance Commissioners (NAIC).⁷

AARP/UnitedHealthcare

Visit MedicareSupplement.com

What's notable: Around one out of every three Medigap beneficiaries are enrolled in a plan from UnitedHealthcare and AARP.⁹

UnitedHealthcare is one of the top two largest insurance companies in the world.¹⁰ The company offers 9 of the 10 standardized Medigap plans that are available in most states, including the popular Plan F and Plan G, which account for 73% of all Medigap plan enrollment.²

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

Visit MedicareSupplement.com

What’s notable: Anthem Blue Cross Blue Shield is just one of a number of affiliated companies that sell Medicare Supplement plans in a number of states under various names tied to Anthem and Blue Cross Blue Shield. 

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.

Humana

Visit Humana-MedicareSupplement.com

What’s notable: 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

Visit MedicareSupplement.com

What’s notable: Cigna has been in business since 1792, and Cigna Health & Life Insurance Company receives fewer consumer reports of complaints than the average insurance company, according to the National Association of Insurance Commissioners.¹⁵

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, which can help with everything from checking on the status of a Medicare claim to paying monthly premiums.

Manhattan Life

Visit MedicareSupplement.com

What’s notable: At more than 170 years old, Manhattan Life is one of the longest continuously operating companies in the U.S.¹⁷

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

Visit MedicareSupplement.com

What’s notable: Bankers Fidelity has been selling Medigap plans for more than 30 years.

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

Visit MedicareSupplement.com

What’s notable: Transamerica serves more than 11 million people in America and is over 100 years old.¹⁹

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

Visit MedicareSupplement.com

What’s notable: Medico has been offering insurance designed specially for older adults since well before the Medicare program began.

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.

Other Top Medigap Companies

While the above companies made our supplemental insurance companies list of the top 10 Medigap providers, there may still be some other solid and reputable insurance companies that offer Medicare Supplement plans near you, depending on where you live.

These companies can include, in no particular order:

• Aflac Medicare Supplement
• Central States Indemnity (CSI)
• GPM Health and Life Insurance Company
• National General
• Oxford Life Insurance Company
• United American Health Insurance Company

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 the company with the best Medicare insurance 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.

Note: If you're looking for the best Medicare Advantage insurance companies, check out our review of the best Medicare Advantage plans and companies of 2024.

Helpadvisor.com is owned and operated by Tranzact, the parent company of TZ Insurance Solutions LLC, which is the owner/operator of MedicareSupplement.com and other websites mentioned on HelpAdvisor and which has a financial relationship with some of the carriers listed on HelpAdvisor. This may influence which products we write about, but HelpAdvisor maintains editorial independence, and our opinions and evaluations are our own.