The 7 Best Medigap Supplement Plans of 2026
The best Medigap supplement plans of 2026 are Plan G for comprehensive coverage, Plan N for lower premiums, and High-Deductible Plan G for the lowest cost. Compare top insurers — AARP/UnitedHealthcare, Mutual of Omaha, Aetna, Cigna and more — and how to choose.
The best Medigap (Medicare Supplement) plans of 2026 are Plan G for the most comprehensive coverage available to new enrollees, Plan N for lower premiums with small copays (learn more about best home care agencies for seniors in 2026: 7 top options compared) (learn more about questions to ask when touring memory care facilities) (learn more about best caregiver support resources in 2026: 7 programs every family should know) (learn more about pension or lump sum? a 5-step framework for the $500k retirement decision), (learn more about medicare part a vs. part b: 7 key differences explained (2026)) and High-Deductible Plan G for the lowest monthly cost. Among insurers, AARP/UnitedHealthcare, Mutual of Omaha, Aetna, Cigna, Blue Cross Blue Shield, and Humana consistently rank highest for financial strength, pricing, (learn more about social security optimization strategy guide: maximize your retirement benefits) and nationwide availability. Because all Medigap plans of the same letter cover the exact same standardized benefits by law, the smart move is to pick the plan letter first, then shop insurers on price and rate stability.
Original Medicare leaves you responsible for deductibles, copays, and 20% coinsurance with no annual out-of-pocket limit. A Medigap policy fills those gaps. Below is how the top plan types and carriers compare in 2026, and how to choose between them.
How Medigap Plans Work
Medigap plans are standardized and labeled by letter (A, B, D, G, K, L, M, N, and High-Deductible G). A Plan G from one insurer covers identical benefits to a Plan G from another — only the premium, customer service, and rate-increase history differ. This standardization is what makes Medigap easy to shop once you know which letter fits your budget and risk tolerance.
Note: Plans C and F are no longer available to people who became eligible for Medicare on or after January 1, 2020. For new enrollees, Plan G is the most comprehensive option.
1. Plan G — Best Overall Coverage
Plan G covers everything except the small annual Part B deductible ($257 in 2025, adjusted annually). After that deductible, you pay virtually nothing out of pocket for Medicare-approved services. It is the most popular choice for new enrollees who want predictable, near-complete coverage and are willing to pay a moderate premium.
2. Plan N — Best for Lower Premiums
Plan N offers lower monthly premiums than Plan G in exchange for small copays (up to $20 for office visits, up to $50 for ER visits that do not lead to admission) and it does not cover Part B excess charges. For people who see doctors that accept Medicare assignment and want to save on premiums, Plan N is often the best value.
3. High-Deductible Plan G — Best for Lowest Monthly Cost
High-Deductible Plan G carries the lowest premium of the comprehensive plans. You pay out of pocket until you meet an annual deductible ($2,870 in 2025), after which coverage matches standard Plan G. It suits healthy enrollees who rarely use care and want catastrophic-style protection at a low monthly price.
4. AARP / UnitedHealthcare — Best for Nationwide Availability
The AARP-branded plans from UnitedHealthcare are among the most widely available and offer strong financial stability. Membership perks and broad acceptance make them a common default, though premiums are not always the lowest — compare before assuming AARP is cheapest.
5. Mutual of Omaha — Best for Rate Stability
Mutual of Omaha is frequently cited for competitive pricing and a history of moderate rate increases, which matters because Medigap premiums typically rise with age and inflation. A plan that starts cheap but raises rates aggressively can cost more over time.
6. Aetna & Cigna — Best for Competitive Pricing
Aetna (CVS Health) and Cigna both offer broadly competitive Medigap premiums and solid financial-strength ratings. Availability and exact pricing vary by state, so both belong on any quote comparison.
7. Blue Cross Blue Shield & Humana — Best for Regional Strength
Blue Cross Blue Shield plans are regionally dominant and often price well in their home states, while Humana offers wide availability and household discounts in many markets. Always check the local BCBS affiliate, since pricing and service differ by state.
Plan Comparison at a Glance
| Plan | Monthly Premium (typical) | Out-of-Pocket Exposure | Best For |
|---|---|---|---|
| Plan G | Moderate | Part B deductible only | Most comprehensive coverage |
| Plan N | Lower | Small copays + excess charges | Premium savings |
| High-Deductible G | Lowest | Up to annual deductible | Healthy, low-utilization enrollees |
How to Choose the Right Medigap Plan
Follow three steps. First, pick your plan letter based on how much premium versus out-of-pocket risk you want — Plan G for near-complete coverage, Plan N to save on premiums, High-Deductible G for the lowest monthly cost. Second, compare insurers on price and rate-increase history for that exact letter in your ZIP code, since identical benefits can carry very different premiums. Third, enroll during your Medigap Open Enrollment window — the six months starting when you are 65 and enrolled in Part B — when insurers cannot deny you or charge more for health conditions. Outside that window, medical underwriting may apply.
Medigap vs. Medicare Advantage
Medigap works alongside Original Medicare and lets you see any provider that accepts Medicare nationwide, with predictable costs but a monthly premium. Medicare Advantage bundles coverage (often with a $0 premium) but uses networks and requires plan approvals. Neither is universally better — Medigap favors flexibility and predictability, Advantage favors low upfront cost. The right choice depends on your health, travel, and budget.
Frequently Asked Questions
Which Medigap plan is best for 2026? Plan G offers the most comprehensive coverage for new enrollees; Plan N is best for lower premiums, and High-Deductible Plan G for the lowest monthly cost.
Are all Plan G policies the same? Yes — benefits are standardized by law, so insurers differ only on premium, service, and rate-increase history.
Why are Plans C and F unavailable? They can no longer be sold to people who became Medicare-eligible on or after January 1, 2020; Plan G is the closest comprehensive alternative.
When should I enroll in Medigap? During your six-month Medigap Open Enrollment period at 65, when you have guaranteed-issue rights and cannot be turned down for health reasons.
SeniorSimple provides educational information to help you understand Medicare options. This is not insurance advice or a solicitation. Premiums and plan details vary by state and year — confirm current rates and speak with a licensed advisor or visit Medicare.gov before enrolling.