Best Medicare Supplement Insurance Companies of 2026 (Ranked)

Best Company vs. Best Plan: Why the Carrier Choice Matters

Medigap plans are standardized by the federal government, which means a Plan G sold by UnitedHealthcare provides the exact same benefits as a Plan G sold by HealthSpring or a regional Blue Cross plan. The benefit chart is identical down to the penny. So why does the carrier choice matter so much?

It comes down to four variables:

1. Initial premium in your zip code at your age
2. Rate-increase history, which shapes what you pay five and ten years from now
3. Customer service and claims handling
4. Underwriting flexibility if you ever need to switch plans outside open enrollment

A cheap Medigap policy from a carrier with a history of 12% annual hikes will cost you more in five years than a slightly pricier policy from a carrier with stable 4% to 6% increases. This matters even more in 2026: actuarial forecasts call for average Medigap premium increases of 8% to 12% this year, driven by medical inflation and a sharply higher Part B premium. If you want a deeper dive on benefits by plan letter, our guide on Medicare Supplement Plan G coverage and costs breaks down the most popular option.

How We Ranked the Top Medicare Supplement Companies

Our 2026 ranking weighs six factors:

• Financial strength (AM Best rating, Superior or Excellent preferred)
• Pricing competitiveness in major metro areas
• Rate-increase history over the last five years
• NAIC complaint index relative to company size
• Plan availability (which letters are sold in which states)
• Customer service reputation and digital tools

The all-carrier 2026 Plan G average runs about $165.85/month at age 65 and roughly $266.87/month at age 85, with Medigap as a whole averaging about $149.50/month across all plan letters. Use those numbers as the benchmark when you compare any individual quote below.

1. Mutual of Omaha: Top Pick for Financial Strength

Mutual of Omaha consistently sits at the top of nationwide Medigap rankings. AM Best continues to rate Mutual of Omaha at A+ (Superior), the highest rating among the major Medicare Supplement carriers, and the company has paid claims continuously since 1909. NerdWallet's 2026 review specifically called out Mutual of Omaha as "best for premium discounts," largely because of its household discount of up to 12%, which is substantially higher than industry norms.

Plans offered: A, F, G, High-Deductible G, and N in most states. Plan availability varies.

Best-fit customer: Healthy 65-year-olds who want a carrier with one of the strongest balance sheets in the industry, paired with a willingness to shop carefully because some recent state filings (most notably a 40% Illinois increase in 2025) have been steeper than peers.

2. UnitedHealthcare / AARP: Largest National Footprint

UnitedHealthcare underwrites the AARP-branded Medigap plans and runs one of the largest Medicare Supplement programs in the country. AM Best rating: A (Excellent). NerdWallet's 2026 Medigap rankings name AARP/UnitedHealthcare "best for plan availability," reflecting its broad nationwide footprint.

Plans offered: A, B, C, F, G, K, L, and N. You must be an AARP member (about $15 to $20/year) to enroll. Investopedia's 2026 Plan G review lists AARP from UnitedHealthcare with an average Plan G premium of about $268/month, though actual rates vary widely by zip code. In New York, for example, AARP/UnitedHealthcare Plan G runs roughly $336 to $372/month by region.

Best-fit customer: Beneficiaries who value brand familiarity, broad nationwide availability, and AARP perks. UnitedHealthcare uses a "community-rated" pricing structure in many states, meaning premiums do not increase based on your individual age after enrollment. For a deeper look at this carrier, read our full AARP Medicare Supplement plans review.

3. HealthSpring (Formerly Cigna): Best Pricing in Many Markets

Cigna's Medigap business changed hands in 2025. On March 19, 2025, Health Care Service Corporation (HCSC) completed the acquisition of Cigna Healthcare's Medicare Advantage, Medicare Supplement, Medicare Part D, and CareAllies businesses, bringing roughly 3.6 million Medicare members under HCSC and total membership to about 26.5 million. Cigna Healthcare Medicare Supplement is transitioning to the HealthSpring brand for 2026, and 2026 plan materials, ID cards, and the member portal display the HealthSpring name while underlying Medigap benefits remain unchanged. AM Best rating remains in the A (Excellent) range.

Plans offered: A, F, G, High-Deductible G, and N in most states. HealthSpring now offers Medicare Supplement plans in 48 states and D.C.

Best-fit customer: Price-sensitive shoppers in their late 60s and 70s who want competitive Plan G or Plan N premiums. NerdWallet's 2026 rankings designate HealthSpring (formerly Cigna) as "best for low prices."

4. Aetna (CVS Health): Strong on Plan N

Aetna, part of CVS Health, is a major Medigap carrier with an AM Best rating of A (Excellent). Aetna's Medigap policies are typically issued through Aetna Health and Life Insurance Company or Continental Life Insurance Company of Brentwood, Tennessee, depending on the state.

Plans offered: A, B, F, G, High-Deductible G, and N in most states.

Best-fit customer: Buyers focused on Medicare Supplement Plan N, where Aetna is often price-competitive. One caution: Aetna was flagged in 2025 actuarial reviews for pursuing significantly larger rate increases than peers in several states, so verify the most recent rate filings in your state before committing.

5. Humana: Best Digital Experience

Humana is best known for Medicare Advantage but also writes Medigap nationally. AM Best rating: A (Excellent). In contrast to some peers, Humana has generally not been taking the outsized rate increases seen at Aetna and Mutual of Omaha in select markets, which makes it worth a fresh look in 2026.

Plans offered: A, F, G, High-Deductible G, and N in most states.

Best-fit customer: Tech-comfortable seniors who want strong member apps, telehealth integration, and bundled discounts when paired with other Humana products.

6. Blue Cross Blue Shield: Best Regional Pricing

Blue Cross Blue Shield is not a single company. It is a federation of independently operated plans, each licensed in a specific state or region (e.g., BCBS of Texas, Highmark BCBS, Florida Blue). AM Best ratings vary by entity but most major BCBS plans hold A or A- ratings.

Plans offered: Varies dramatically by state. Most BCBS plans offer Plan A, F, G, and N.

Best-fit customer: Beneficiaries in states where the local Blue plan dominates the market and negotiates strong provider relationships. In many states, BCBS sells the cheapest Plan G at age 65.

7. Anthem: BCBS Alternative in 14 States

Anthem (now operating under parent Elevance Health) is a publicly traded health insurer that licenses the Blue Cross Blue Shield brand in 14 states (California, New York, Virginia, Ohio, Indiana, Kentucky, Wisconsin, and others). AM Best rating: A (Excellent).

Plans offered: A, F, G, and N in most service-area states.

Best-fit customer: Residents of Anthem states who want a large, well-capitalized national carrier with strong local provider networks. Recent expert reviews have credited Anthem with one of the lowest average Plan G premiums among major carriers, with a complaint index roughly in line with what would be expected for its size.

8. USAA: Best for Military Families

USAA's Medigap plans are underwritten through partnerships and target military members, veterans, and their families. AM Best rating: A++ (Superior) at the parent level.

Plans offered: Plan A, Plan G, and Plan N for new enrollees in most states. Plan F is available only to those eligible before January 1, 2020.

Best-fit customer: Veterans and military-affiliated households who value USAA's service model. Independent reviews have found USAA's annual price increases are smaller than average, but the initial Plan G premium can run materially higher than the cheapest local alternative.

9. State Farm: Stable but Limited Availability

State Farm is best known for auto and home insurance, but it also sells Medicare Supplement plans in roughly 35 states through its life insurance subsidiary. AM Best rating: A++ (Superior). State Farm is the rate-stability standout of this list: NerdWallet's 2026 Medigap rankings name State Farm "best overall," citing strong performance on premiums, complaint rates, plan availability, and price increases across the carriers covering about 87% of all Medigap beneficiaries.

Plans offered: Plan A, F, G, and N in available states. Plan F is closed to newly eligible Medicare enrollees.

Best-fit customer: Existing State Farm customers who already work with a local agent and value a single-point-of-contact relationship.

Quick Comparison Table: Top 2026 Medigap Carriers

Red Flags: Carriers and Patterns to Avoid

Even an A-rated carrier can hurt your wallet over time. Watch for these warning signs before enrolling.

Closed Blocks of Business

A "closed block" means the carrier no longer sells new policies in that plan, so the only people remaining are aging and increasingly likely to file claims. With no new healthy enrollees to spread risk, closed blocks almost always experience accelerating rate increases, sometimes 50% to 70%+ over a few years. Plan F is the most famous example since it is closed to anyone who became Medicare-eligible on or after January 1, 2020. Read our deep dive on Medicare Plan F eligibility and risks for context.

Double-Digit Annual Rate Hikes

Three or more consecutive years of 10%+ rate increases is a major red flag, and 2026 forecasts make this warning more relevant than ever. Independent actuarial projections call for average Medigap premium increases of 8% to 12% across the market in 2026, with the 2026 Part B premium itself rising more than 11% from $185 to $202.90 per month. In several states, Mutual of Omaha and Aetna were specifically called out for pursuing significantly larger 2025 rate increases than peers, and Mutual of Omaha's Illinois filing landed near 40%. Ask your agent for the carrier's three-year rate-increase history in your specific state before enrolling. For a deeper look at long-term price behavior, see our guide on Medicare Supplement cost in 2026.

Heavy Marketing, Thin Capital

Smaller "low-ball" carriers sometimes enter a state with aggressive pricing to capture market share, then file steep increases two or three years later. If a quote looks $40+/month below every other A-rated carrier, ask why.

How to Compare Carriers in Your State

National rankings are a starting point, but Medicare Supplement is sold at the state level, and pricing varies wildly by zip code. New York rate filings, for example, show standard Plan G running roughly $336 to $372/month for AARP/UnitedHealthcare and $384 to $511/month for Mutual of Omaha, both well above the national age-65 average of about $166.

1. Get quotes from at least three to five carriers for the same plan letter (Plan G or Plan N for most buyers).
2. Ask each agent for the carrier's 5-year rate-history in your state, not nationally.
3. Confirm AM Best rating is A- or better, with A or A+ strongly preferred.
4. Verify the block is open (still accepting new enrollees) for that plan letter.
5. Check NAIC complaint index for the exact legal entity in your state.

If you are still deciding between Medigap and Medicare Advantage, our Medigap vs. Medicare Advantage comparison lays out the full trade-offs. And if you want to see how the top plan letters stack up, the best Medicare Supplement plans of 2026 ranks the most popular plan letters head-to-head.

Frequently Asked Questions

Is the best Medicare Supplement company the same in every state?

No. Pricing, plan availability, and rate-increase history vary by state. A carrier that is the cheapest in Texas may be the most expensive in New York. Always run a state-specific quote rather than relying on a national ranking, since each carrier files separate rates with each state's department of insurance.

Does the AM Best rating really matter for Medigap?

Yes, but with a caveat. AM Best measures financial strength, which matters because Medigap is a long-term contract you may hold for 20+ years. Any carrier rated A- or better is highly unlikely to default, but A+ or A++ carriers like Mutual of Omaha, State Farm, and USAA have larger reserves that often translate into more stable long-term rate behavior. Always verify the exact legal entity (not just the marketing name) on ambest.com.

What happened to Cigna's Medicare Supplement plans?

HCSC completed its acquisition of Cigna's Medicare Advantage, Medicare Supplement, and Part D businesses on March 19, 2025, and those products are transitioning to the HealthSpring brand for the 2026 plan year. Existing Cigna Medigap members keep the same federally standardized benefits. Only the carrier name, ID cards, and member portal change.

Why are UnitedHealthcare/AARP rates sometimes higher than competitors?

UnitedHealthcare uses community-rated pricing in many states, meaning premiums do not climb based on your individual age after enrollment. That makes the initial premium higher at age 65 but flatter as you age. Carriers using attained-age pricing start cheaper but raise rates every year as you get older, so the lifetime cost can sometimes be lower with UHC.

What is a "closed block" and why does it matter?

A closed block is a group of policies the carrier no longer sells. Because no new (typically healthier) enrollees join, the average age and claims cost of the remaining pool keeps rising, which forces large premium increases on existing policyholders. Plan F became a closed block on January 1, 2020 for newly eligible Medicare beneficiaries, and many Plan F holders have seen above-average rate hikes since.

Can I switch Medicare Supplement companies later?

Yes, but outside your Medigap Open Enrollment Period (the six months starting when you turn 65 and enroll in Part B), most carriers can use medical underwriting to deny coverage or charge higher premiums. A handful of states (such as Connecticut, Massachusetts, Maine, and New York) offer year-round guaranteed-issue or annual switch rights. Always check your state's specific rules before assuming you can change carriers later.