Best Medicare Supplement Plans of 2026: Top Picks Compared

Why Original Medicare Alone Isn't Enough

Original Medicare (Parts A and B) is a solid foundation, but it was never designed to cover everything. The gaps it leaves behind can translate into serious financial exposure, and in 2026, those gaps are wider than ever.

Here's what you're responsible for under Original Medicare in 2026:

The most dangerous gap of all? Original Medicare has no out-of-pocket maximum. A serious illness or prolonged hospital stay could cost you tens of thousands of dollars with no ceiling. Medicare Supplement insurance (Medigap) is specifically designed to seal these gaps, giving you predictable costs and financial peace of mind. For a deeper look at where Original Medicare falls short, see our guide on gaps a Medigap plan can fill.

The Most Popular Medigap Plans: G vs. N

Medigap plans are standardized by the federal government, meaning a Plan G from one insurer covers exactly the same benefits as a Plan G from another. The difference between carriers comes down to price, customer service, and rate stability, not coverage.

Of the 10 standardized plan types available, Plan G and Plan N are the most popular choices for new enrollees in 2026. For a full side-by-side of every plan letter, see our Medigap plans comparison chart.

Plan G: The Gold Standard

Plan G is the most comprehensive Medigap plan available to new enrollees. After you pay the annual Part B deductible ($283 in 2026), Plan G covers 100% of all remaining Medicare-approved costs. No copays, no coinsurance, no surprises. Learn more about Medicare Supplement Plan G coverage in our dedicated breakdown.

Plan G covers:

• Part A hospital deductible and coinsurance
• Part A hospice care coinsurance
• Skilled nursing facility coinsurance
• Part B coinsurance (after the Part B deductible)
• Part B excess charges
• First 3 pints of blood
• 80% of foreign travel emergency care

Best for: Frequent healthcare users, anyone with chronic conditions, retirees who travel, or anyone who values maximum predictability in their healthcare budget.

Plan N: The Budget-Friendly Alternative

Plan N offers nearly identical core coverage to Plan G but trades lower monthly premiums for modest out-of-pocket costs when you use care. See our deep dive on Plan N coverage and costs for more detail.

Key differences vs. Plan G:

Best for: Relatively healthy seniors with infrequent doctor and ER visits who want to save on monthly premiums.

Plan G vs. Plan N: 2026 Cost Comparison

According to 2026 national data, the average Plan G premium at age 65 is approximately $166/month, while Plan N averages about $123/month. Actual premiums vary widely by ZIP code, gender, tobacco status, and carrier. Premiums also climb with age: by 75 the Plan G average rises to roughly $205/month, and by 85 it reaches about $267/month.

If you became Medicare-eligible before January 1, 2020, you may also want to compare against Plan F coverage details, which is no longer available to newer enrollees. Budget-focused shoppers may also want to explore High Deductible Plan G, which carries a $2,950 annual deductible in 2026 in exchange for significantly lower premiums (often $60 to $90/month for a 65-year-old).

Top-Rated Medicare Supplement Companies of 2026

Because Medigap benefits are standardized, choosing the right insurance company is just as important as choosing the right plan. Below are the top-ranked carriers for 2026 based on premiums, rate increase history, financial strength, and customer satisfaction. For deeper carrier profiles, see our full ranking of the best Medigap insurance companies.

🥇 1. State Farm (Best Overall)

State Farm tops NerdWallet's 2026 Medigap rankings as the best overall carrier, with a complaint rate roughly half the industry average and below-average premiums in many states. It's especially appealing if you prefer working face-to-face with a local agent who handles your auto and home insurance too.

AM Best Rating: A++ (Superior)

🥈 2. Mutual of Omaha (Best for Premium Discounts)

Mutual of Omaha earns top marks for its competitive pricing, generous household discounts (up to 12%), and one of the lowest complaint rates in the industry. With one of the largest Medigap risk pools in the country, they offer stable carrier service and flexible underwriting on many conditions. Read our full Mutual of Omaha Medicare Supplement review for more detail.

AM Best Rating: A+ (Superior, reaffirmed in 2026)

🥉 3. HealthSpring / Cigna (Best for Low Prices)

Cigna's Medigap business, rebranded as HealthSpring under HCSC ownership after the March 2025 acquisition, is a strong pick for low prices in 2026, with some of the cheapest premiums of any major carrier and small annual price increases (roughly 6% on average). Their household and online discounts can stack up to 25% in many states. Read our full Cigna Medicare Supplement review for the latest 2026 details.

AM Best Rating: A (Excellent, affirmed April 2025)

4. AARP / UnitedHealthcare (Best for Plan Availability)

UnitedHealthcare, backed by the AARP brand, is the largest Medigap insurer in the nation by enrollment. They offer excellent digital tools, broad plan availability in all 50 states, and a trusted brand. AARP membership (about $15 the first year with auto-renew, $20 standard) is required to enroll. AM Best affirmed UnitedHealthcare's A+ (Superior) rating but revised the outlook to negative in June 2025, a status that remains in place through 2026. See our AARP Medicare Supplement plans review for a full breakdown.

AM Best Rating: A+ (Superior, negative outlook)

5. Aetna (Best for Value Pricing)

Aetna regularly appears in 2026 top-five lists for Medigap value, offering very competitive premiums on Plan G and the high-deductible version. Backed by CVS Health, Aetna has strong financial backing and broad nationwide availability.

AM Best Rating: A (Excellent)

Quick Company Comparison

Beyond the big five, some specialist rankings highlight smaller carriers like Medico/Wellabe and Bankers Fidelity for their disciplined pricing and competitive Plan G/N rates. If you live in a state where these carriers are active, it's worth getting a quote from them alongside the majors.

Medigap vs. Medicare Advantage: Which Is Right for You?

One of the biggest decisions you'll face is whether to pair Original Medicare with a Medigap plan or skip Original Medicare in favor of a Medicare Advantage (Part C) plan. For a deeper analysis, read our full Medigap vs. Medicare Advantage breakdown.

Side-by-Side Comparison (2026)

The federal Medicare Advantage maximum out-of-pocket limit actually decreased in 2026 to $9,250 for in-network services (down $100 from $9,350 in 2025). The national median MA out-of-pocket cap that plans actually use rose from $5,400 to about $5,900, a 9.3% jump year over year. Neither MOOP includes Part D drug spending, which has its own separate 2026 cap of $2,100, the new annual ceiling on what you'll pay out of pocket for covered Part D prescriptions.

Choose Medigap if: You have ongoing health needs, see specialists regularly, travel frequently, or simply want to know exactly what you'll pay every month.

Choose Medicare Advantage if: You're generally healthy, comfortable with a network, and want to minimize monthly premiums while gaining extras like dental and vision. If you already have MA and want to change course, our guide on switching from Medicare Advantage to Medigap walks you through the process, especially important now that roughly 2.9 million enrollees are being displaced by 2026 plan exits.

How and When to Enroll: Open Enrollment & Guaranteed Issue Rights

Getting the timing right is critical with Medigap. Miss your window, and you could face medical underwriting, meaning insurers can charge you more or even deny coverage based on your health history. Our Medicare Supplement Open Enrollment guide covers the rules in detail, and our underwriting guide explains the health questions you'll face if you apply after.

Your Medigap Open Enrollment Period

Your 6-month Medigap Open Enrollment Period begins on the first day of the month you turn 65 AND are enrolled in Medicare Part B. During this window:

• Insurers cannot deny you coverage based on health conditions
• You cannot be charged more due to pre-existing conditions
• You can enroll in any Medigap plan offered in your state

⚡ Example: If you turn 65 and enroll in Part B on July 1, your open enrollment window runs July 1 to December 31.

Guaranteed Issue Rights

Even outside your open enrollment window, certain life events trigger guaranteed issue rights, allowing you to enroll without underwriting:

• Your Medicare Advantage plan is discontinued or leaves your service area
• You move out of your plan's service area
• You lose employer-sponsored group health coverage
• You enrolled in Medicare Advantage at 65 and want to switch back within 12 months (trial right)

2026 State-Level Updates

As of 2026, roughly 15 U.S. states now offer some form of annual guaranteed-issue Medigap switching window that goes beyond federal minimums. Most of these are "birthday rules" or fixed annual windows that let existing Medigap enrollees switch to a plan with equal or lesser benefits without underwriting. For a deeper state-by-state breakdown, see our Medicare Supplement plans by state guide and our dedicated birthday rule guide.

Notable 2026 changes include:

• Delaware: New 60-day birthday rule effective January 1, 2026, with a window starting 30 days before and ending 30 days after the insured's birthday (any carrier, equal or lesser benefits). Delaware also added new guaranteed-issue rights for people leaving Medicare Advantage during AEP or MA OEP.
• Indiana: 60-day birthday rule effective January 1, 2026, allowing a switch to another carrier's version of the same standardized plan letter.
• West Virginia: New 60-day birthday rule effective for policies renewing on or after June 11, 2026, initially limited to the same insurer or an affiliate (with broader access if no equivalent plan exists for 12 months).
• Minnesota: A new annual guaranteed-issue period for enrollees ages 65 to 70 is scheduled to take effect August 1, 2026.
• New Mexico: New birthday rule enacted in 2026, but not effective until January 2027.

There are no new federal changes for 2026 to the standard Medigap open enrollment rule or to guaranteed issue rights. The fall Annual Election Period (Oct 15 to Dec 7) still applies only to Medicare Advantage and Part D, not to Medigap.

After Open Enrollment: Medical Underwriting

If you apply for Medigap outside your open enrollment window and no guaranteed issue right applies, insurers can:

• Require a health questionnaire
• Charge higher premiums based on health history
• Deny your application entirely

How to Compare Quotes and Choose the Right Plan

Because Medigap benefits are 100% standardized, price and carrier stability are the deciding factors when comparing plans. For a full walkthrough, see our Medigap quote shopper's guide.

Step-by-Step Guide

1. Determine your plan type first. Decide between Plan G (maximum coverage) or Plan N (lower premiums, minor cost-sharing). Your health usage patterns should guide this decision.
2. Get quotes from multiple carriers. The same Plan G can vary by $50 to $100/month depending on the insurer and your ZIP code. Always compare at least 3 to 5 quotes.
3. Check rate increase history. Low premiums today mean nothing if a carrier raises rates 15% every year. Ask about historical rate increases before committing. Many carriers pushed through 12% to 26% Medigap Plan G increases for 2026, with some closed-block filings running as high as 45%.
4. Verify AM Best financial ratings. Stick to carriers with an AM Best rating of A (Excellent) or better to ensure long-term claims-paying reliability.
5. Review household discounts. Many carriers offer 5% to 12% discounts if two people in the same household enroll together, and some (like HealthSpring) stack online discounts on top for up to 25% total savings.
6. Consider the pricing methodology. Medigap plans use three pricing structures: community-rated (same price for all ages), issue-age-rated (locked at your age at enrollment), and attained-age-rated (increases as you age). Issue-age or community-rated plans often provide the best long-term value.
7. Decide between a broker and direct. Premiums are identical either way, but a licensed broker can show you multiple carriers in a single call.

Frequently Asked Questions

What is the best Medicare Supplement plan for 2026?

Plan G is widely considered the best overall Medicare Supplement plan for 2026. It covers virtually all gaps in Original Medicare, including the Part A deductible, all coinsurance, and Part B excess charges, after you pay the annual Part B deductible of $283. For healthy seniors seeking lower premiums, Plan N is an excellent runner-up. The "best" plan ultimately depends on your health needs and budget.

How much do Medicare Supplement plans cost in 2026?

Medigap premiums vary based on your age, ZIP code, gender, tobacco use, and the carrier you choose. National 2026 data shows the average Plan G premium at age 65 is around $166/month, while Plan N averages about $123/month and High Deductible Plan G runs roughly $60 to $90/month. Always compare quotes from multiple carriers, as the same plan can vary by $50 to $100/month depending on the insurer.

What are the top 5 Medicare Supplement insurance companies?

Based on 2026 analyses from NerdWallet and independent reviewers scoring premiums, rate stability, financial strength, and customer satisfaction, the top 5 Medigap companies in 2026 are typically: (1) State Farm, (2) Mutual of Omaha, (3) HealthSpring/Cigna, (4) AARP/UnitedHealthcare, and (5) Aetna. All five carry strong AM Best financial ratings, with State Farm earning an A++ Superior rating and the lowest complaint ratio in the industry. Specialist reviewers also flag Medico/Wellabe and Bankers Fidelity as excellent lower-cost alternatives.

Is Medigap better than Medicare Advantage?

Neither option is universally better. It depends on your situation. Medigap pairs with Original Medicare to give you unlimited provider access and very predictable costs, making it ideal for people with ongoing health needs or frequent travel. Medicare Advantage offers lower monthly premiums (averaging just $14/month in 2026, with many $0 plans) and extras like dental and vision, but restricts you to a network and can expose you to up to $9,250 in in-network out-of-pocket costs per year.

Can I be denied a Medicare Supplement plan?

During your 6-month Medigap Open Enrollment Period (which begins when you're 65 and enrolled in Part B), insurers cannot deny you coverage or charge more based on your health. Outside this window, unless you qualify for guaranteed issue rights, insurers may require medical underwriting and can deny coverage or charge higher premiums based on your health history. As of 2026, roughly 15 states offer additional annual guaranteed-issue switching windows, so check your state's specific rules before assuming you'll need underwriting.