Which Medigap Plan Is Actually Best for You in 2026?

If you've spent any time researching Medicare supplemental coverage, you've probably noticed that the question 'which Medigap plan is best?' gets asked constantly — and answered inconsistently. The honest answer is that no single plan is best for everyone, but there are clear frontrunners depending on your health status, how frequently you use medical care, and how much financial risk you're comfortable carrying. In 2026, the two plans that dominate new enrollments are Plan G and Plan N, and understanding the real difference between them can save you hundreds — or even thousands — of dollars per year.

Medigap, also called Medicare Supplement Insurance, is private insurance that works alongside Original Medicare (Parts A and B) to cover costs that Medicare doesn't pay — things like hospital deductibles, coinsurance, and copayments. Without any supplement, a Medicare beneficiary hospitalized for a serious illness could face the Part A deductible of $1,676 per benefit period in 2026, plus daily coinsurance charges if the stay extends beyond 60 days. Medigap plans are designed to eliminate or sharply reduce that exposure. They are sold by private insurers but regulated by the federal government, which means the benefits attached to each letter plan are standardized across most states. A Plan G sold by Aetna covers the same core benefits as a Plan G sold by Mutual of Omaha — the only real difference is the monthly premium and the company's customer service reputation.

Plan G is currently the most comprehensive Medigap plan available to beneficiaries who became eligible for Medicare on or after January 1, 2020. (Plan F, which was the gold standard before that date, covered the Part B deductible as well, but it's no longer available to new enrollees.) Plan G covers the Part A hospital deductible, Part A coinsurance and hospital costs up to an additional 365 days after Medicare benefits are exhausted, Part B coinsurance or copayments, the first three pints of blood, Part A hospice care coinsurance, skilled nursing facility coinsurance, and foreign travel emergency care up to plan limits. The one gap in Plan G is the annual Part B deductible, which is $257 in 2026. You pay that once per year out of pocket, and after that, Plan G picks up 100% of Medicare-approved costs. For someone who sees specialists regularly, takes infusions, or has a chronic condition requiring frequent outpatient care, Plan G can essentially eliminate surprise medical bills for the year.

Plan N offers a noticeably lower monthly premium — often $30 to $70 less per month than Plan G depending on your age, gender, location, and the insurer — but it introduces some cost-sharing that Plan G eliminates. With Plan N, you pay the Part B deductible ($257 in 2026), copays of up to $20 for office visits, and up to $50 for emergency room visits that don't result in inpatient admission. Plan N also does not cover Part B excess charges, which are fees that doctors who don't accept Medicare assignment can legally charge above the Medicare-approved amount — up to 15% more. In states like Ohio, Texas, and Florida, where a meaningful number of physicians opt out of Medicare assignment, this gap can matter. In states where excess charges are prohibited by law — including New York, Pennsylvania, Connecticut, Massachusetts, Minnesota, Ohio, and Vermont — Plan N's coverage gap on that front is essentially a non-issue.

To put the cost difference in concrete terms: if Plan G costs you $180 per month and Plan N costs $130 per month, you're saving $600 per year with Plan N. But if you have 20 doctor visits in a year at $20 per copay, that's $400 in copays — plus the $257 Part B deductible — meaning your actual out-of-pocket exposure under Plan N could reach $657 before you've had a single hospitalization or specialist procedure. In a year where you're healthy and see your primary care doctor four times, Plan N's copays might total just $80, making it the clear financial winner. The math shifts dramatically if you're managing multiple chronic conditions or recovering from surgery.

There are other Medigap plans worth knowing about, even if they're less commonly purchased. Plan K covers 50% of most cost-sharing and has an out-of-pocket maximum of $7,220 in 2026, after which it pays 100% of covered costs for the rest of the year. Plan L works similarly but covers 75% of cost-sharing with a $3,610 out-of-pocket cap. These plans carry lower premiums but expose you to more risk early in the year. Plan A covers only the basic benefits — Part A coinsurance and Part B coinsurance — and is rarely the right choice for most beneficiaries. High-deductible Plan G is a newer option that pairs a very low monthly premium with a $2,870 deductible in 2026; it functions somewhat like a high-deductible health plan and may appeal to beneficiaries who want catastrophic protection without paying for comprehensive coverage they may not use.

One of the most expensive mistakes people make with Medigap is waiting too long to enroll. Your Medigap Open Enrollment Period is a six-month window that begins the month you turn 65 and are enrolled in Medicare Part B. During this window, insurers cannot deny you coverage or charge you more based on your health history — this is called guaranteed issue. Once that window closes, insurers in most states can use medical underwriting, meaning they can reject your application or charge significantly higher premiums if you have conditions like diabetes, heart disease, COPD, or prior cancer treatment. If you miss your open enrollment window and later try to switch plans or enroll for the first time, you may find yourself locked out of the plans you want at any reasonable price.

Thirteen states have enacted what's known as the birthday rule, which gives Medigap policyholders a 30-day window each year around their birthday to switch to a plan with equal or lesser benefits without medical underwriting. Those states are California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, and Oregon. If you live in one of these states and are currently on a plan that no longer fits your needs — or if you're paying too much for your current coverage — your birthday window is an opportunity to shop without health-based penalties. New York and Connecticut go further, requiring guaranteed issue year-round regardless of age or health status.

Premium pricing for Medigap plans varies significantly by insurer, and there are three different pricing structures you should understand before you buy. Community-rated plans charge everyone the same premium regardless of age — these tend to be more expensive when you're younger but don't increase as you get older. Issue-age-rated plans set your premium based on your age when you first buy the policy and don't increase as you age, though they do rise with inflation. Attained-age-rated plans start lower but increase as you get older and are the most common structure — they can look attractive at 65 but become expensive in your 80s. Asking an insurer which pricing model they use before you enroll is not optional; it's essential to understanding your long-term cost trajectory.

To find the best price on a specific plan letter, use Medicare's official Plan Finder tool at medicare.gov or contact your State Health Insurance Assistance Program (SHIP), which provides free, unbiased counseling. SHIP counselors can walk you through plan comparisons, explain your state's specific rules, and help you evaluate whether a lower-premium plan makes financial sense given your actual health utilization. You can find your local SHIP contact through shiphelp.org. The goal isn't to find the cheapest plan — it's to find the plan that gives you the right level of protection at a price you can sustain for years to come.