Medigap, formally called Medicare Supplement insurance, is private coverage that works alongside Original Medicare and helps pay some of the out-of-pocket costs that Parts A and B leave behind, such as coinsurance, copayments, and deductibles. Plans are standardized by letter, meaning a Plan G from one insurer includes the same core benefits as a Plan G from another, so the company you choose matters mainly for pricing method, rate history, and service. This guide looks at ten of the best-known Medigap insurance companies in 2026 and explains how to compare them.
1. AARP-branded plans from UnitedHealthcare
UnitedHealthcare insures the AARP-branded Medicare Supplement plans, which together make up the largest block of Medigap coverage in the country. The plans are available in most states, and the combination of a large insurer and a widely recognized membership brand makes them one of the first options many shoppers review. AARP membership is generally required to apply.
2. Mutual of Omaha
Mutual of Omaha has sold Medicare Supplement insurance for decades and is one of the most frequently quoted carriers in the market. It offers the popular standardized plans, including Plan G and high-deductible Plan G in many states, and is known for a straightforward application process and household discount availability in some areas.
3. Blue Cross Blue Shield affiliates
Independent Blue Cross Blue Shield companies offer Medigap plans in their own states, often under names local residents have known for generations. Because each affiliate sets its own rates and underwriting rules, the value of a Blue-branded Medigap plan depends on the specific company serving your state, but the brand’s long history in health coverage keeps it on most comparison lists.
4. Aetna
Aetna, along with its subsidiary companies such as Continental Life and American Continental, markets Medicare Supplement plans in a large number of states. The company is a familiar national name, and its Medigap products are widely available through independent agents who can quote it alongside other carriers.
5. Cigna Healthcare
Cigna offers Medicare Supplement plans through several affiliated insurers, with availability in much of the country. Its lineup usually includes the most commonly purchased plan letters, and the company’s national scale means service infrastructure and claims processing are well established.
6. Humana
Humana, best known for its Medicare Advantage business, also sells Medicare Supplement plans in many states. For people who prefer Original Medicare with a supplement but want a large, senior-focused carrier, Humana’s Medigap products, sometimes paired with its value-added wellness programs, are a common quote.
7. State Farm
State Farm offers Medicare Supplement insurance through its local agent network in many states. People who already have auto or home policies with a State Farm agent sometimes appreciate managing Medigap coverage through the same office, though it is still wise to compare rates against other carriers.
8. Bankers Fidelity
Bankers Fidelity Life Insurance Company, part of Atlantic American, is a smaller carrier that has specialized in Medicare Supplement insurance for many years, particularly in the Southeast. Smaller specialists like this one can be competitive in certain states, which is why independent agents often include them in quotes.
9. Globe Life and affiliates
Globe Life’s insurance subsidiaries, including United American Insurance Company, have a long history in the Medicare Supplement market. United American has offered Medigap-style coverage since the program’s early years and remains available in many states through agents and direct channels.
10. Allstate Health Solutions
Allstate, a household name in property insurance, entered the Medicare Supplement market through its health subsidiaries, including plans formerly branded under National General. Availability varies by state, but the backing of a large national insurance group has made it a growing presence in Medigap quoting tools.
What Medigap does alongside Original Medicare
Original Medicare pays a large share of hospital and medical costs but has no annual out-of-pocket maximum. Medigap fills specific gaps: depending on the plan letter, it can cover the Part A hospital deductible and coinsurance, the Part B coinsurance, skilled nursing facility coinsurance, and limited foreign travel emergency care. Because Medigap travels with Original Medicare, you can see any provider in the country who accepts Medicare, with no networks or referrals. Claims are typically coordinated automatically: Medicare processes its share first and forwards the remainder to the Medigap insurer, so members rarely need to file paperwork themselves. Medigap plans do not include prescription drug coverage, so most people pair them with a standalone Part D plan.
Which plan letters are most common
For people who became eligible for Medicare in 2020 or later, Plan G is the most comprehensive letter available and the most commonly purchased, covering everything on the standardized benefit chart except the annual Part B deductible. Plan N is the usual lower-premium alternative, trading small office and emergency room copayments and non-coverage of Part B excess charges for reduced monthly cost. High-deductible Plan G suits people who want catastrophic-style protection at a much lower premium. People who were eligible before 2020 may still hold or, in some cases, buy Plan F or Plan C. Massachusetts, Minnesota, and Wisconsin standardize their Medigap plans differently, so shoppers in those states will see a different menu.
Pricing methods and rate history matter
Since benefits are standardized, differences among carriers come down to premiums and how they change over time. Insurers price policies as attained-age, issue-age, or community-rated, and each method behaves differently as you get older. A carrier’s history of rate increases in your state is worth asking about, as is whether household or bank-draft discounts apply. Timing also matters: during your six-month Medigap open enrollment window, which begins when you are 65 or older and enrolled in Part B, companies generally cannot deny coverage or charge more due to health history. Outside that window, medical underwriting may apply in most states.
How to choose a Medigap company
Decide on a plan letter first, then compare several carriers offering that same letter in your ZIP code, looking at premium, pricing method, rate-increase history, and financial strength. Independent ratings from agencies such as AM Best offer one view of an insurer’s stability, and your state insurance department can tell you whether a company has an unusual complaint record. Because the benefits are identical for a given letter, paying a much higher premium for a bigger brand name does not buy additional coverage, though some shoppers still value a carrier’s service reputation. You can review plan letters and search policies in your area at Medicare.gov, and your State Health Insurance Assistance Program provides free, unbiased counseling through shiphelp.org. A licensed independent agent can also quote multiple companies at once.
Final thoughts
Because Medigap benefits are standardized, the best Medigap insurance company for you is usually the one offering your chosen plan letter at a sustainable premium with a solid rate history and dependable service in your state. A policy you can comfortably afford for many years is generally more valuable than the lowest first-year quote. The ten carriers above are among the most recognized in 2026, but state availability and pricing differ widely, so gather several quotes and take advantage of free counseling before you apply.
Disclaimer
This article is for general informational purposes only and is not medical, financial, legal, or enrollment advice. This site is not connected with or endorsed by the U.S. government or the federal Medicare program. Carrier availability, underwriting rules, and premiums vary by state and change over time. Always verify current details on Medicare.gov or with a licensed insurance agent or SHIP counselor before making coverage decisions.