If you're shopping for a Medicare Supplement plan and your eyes go straight to the monthly premium, Medigap Plan N is probably going to catch your attention. It consistently comes in as one of the more affordable standardized Medigap options — often $30 to $70 cheaper per month than Plan G, depending on your age, gender, location, and the insurance company you choose. Over a full year, that's potentially $360 to $840 back in your pocket. But before you sign up based on the premium alone, you need to understand exactly what Plan N covers, what it doesn't, and what kinds of out-of-pocket costs can sneak up on you if you're not paying attention.
Medigap Plan N is one of ten standardized plans sold in most states (Massachusetts, Minnesota, and Wisconsin use different standardized systems). Every insurance company that sells Plan N must offer the same core benefits — that's federal law. In 2025, Plan N covers Medicare Part A coinsurance and hospital costs up to an additional 365 days after Medicare benefits are exhausted, Part A hospice care coinsurance or copayments, skilled nursing facility care coinsurance, the Part A deductible (which is $1,676 per benefit period in 2025), Part B coinsurance with some exceptions, the first three pints of blood, and foreign travel emergency care up to plan limits. What it does not cover is the Part B deductible ($257 in 2025) or Part B excess charges — and those two gaps are where beneficiaries can get surprised.
The Part B deductible exclusion is straightforward. You pay the first $257 of your outpatient medical costs each year before Plan N starts picking up its share. That's a known, capped number you can budget for. The excess charge issue is more complicated and potentially more expensive. When a doctor or other provider doesn't accept Medicare assignment — meaning they haven't agreed to accept Medicare's approved payment rate as payment in full — they can legally charge up to 15% more than what Medicare approves. That extra amount is called an excess charge, and Plan N leaves you responsible for every dollar of it. If you see a specialist who bills $500 above Medicare's rate, that $500 comes out of your pocket. Plan G covers excess charges; Plan N does not.
How much does the excess charge gap actually matter in practice? It depends heavily on where you live and how you use healthcare. Some states — including Ohio, Pennsylvania, and Connecticut — have a relatively high concentration of non-participating providers, meaning excess charges are more common. Other states have banned excess charges entirely. In Massachusetts, Minnesota, and Connecticut, providers cannot bill Medicare patients excess charges, which makes Plan N's gap essentially irrelevant if you live there. If you're in a state where excess charges are common and you see specialists regularly, Plan N's premium savings could easily be wiped out by a handful of excess charge bills in a single year. If you're in a state where excess charges are rare and you primarily use large hospital systems or federally qualified health centers — which must accept Medicare assignment — the risk is much lower.
The copay structure of Plan N is the other piece you need to fully understand before enrolling. Unlike Plan G, which covers your Part B coinsurance in full after the deductible, Plan N requires you to pay a copay of up to $20 for office visits and up to $50 for emergency room visits that don't result in a hospital admission. These copays apply after you've met the annual Part B deductible. If you visit your primary care doctor four times a year and see two specialists, you could be paying an additional $120 in copays annually. That's still well below the premium savings in most cases. But if you're managing multiple chronic conditions and visiting doctors frequently — say, 15 to 20 visits per year — the math starts to shift. At $20 per visit, 20 visits equals $400 in copays, which could eat up a significant portion of what you saved on premiums.
Who is Plan N genuinely well-suited for? Beneficiaries who are in good health, use healthcare services moderately, primarily see doctors within large hospital networks or Medicare-participating practices, and want meaningful protection against catastrophic costs without paying top-dollar premiums. Plan N still covers the Part A deductible, which at $1,676 per benefit period in 2025 can hit hard if you're hospitalized. It covers skilled nursing facility coinsurance, which runs $209.50 per day for days 21 through 100 in 2025. And it covers foreign travel emergencies up to 80% after a $250 deductible, capped at $50,000 lifetime — useful if you travel internationally. These are real protections that Medicare Advantage plans often handle less predictably.
When comparing Plan N to Plan G head-to-head, the decision usually comes down to a break-even calculation. If Plan G costs you $60 more per month — $720 more per year — you need to ask whether your expected out-of-pocket costs under Plan N (the $257 Part B deductible, copays, and any excess charges) will exceed $720. For a relatively healthy person who sees doctors a handful of times per year and uses Medicare-participating providers, the answer is often no, and Plan N comes out ahead financially. For someone managing diabetes, heart disease, or other conditions requiring frequent specialist visits, Plan G's comprehensive coverage may be worth the higher premium to avoid the unpredictability.
Enrollment timing matters enormously with Medigap. Your best window to enroll in any Medigap plan, including Plan N, is during your six-month Medigap Open Enrollment Period, which 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 pre-existing health conditions — that's guaranteed issue. Once this window closes, insurers in most states can use medical underwriting, meaning they can reject your application or charge significantly higher premiums if you have health conditions. If you're past your initial enrollment window, you may still qualify for a Special Enrollment Period if you lose other coverage, such as employer retiree coverage or a Medicare Advantage plan that leaves your area. The Annual Enrollment Period (October 15 through December 7) applies to Medicare Advantage and Part D drug plans, not Medigap — a distinction that confuses many beneficiaries.
One more consideration: if you're already enrolled in a Medigap plan and want to switch to Plan N for the lower premium, you'll likely face medical underwriting in most states unless you qualify for a Special Enrollment Period. However, if you live in one of the states with a birthday rule — California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, or Oregon — you have a 30-day window around your birthday each year to switch to a Medigap plan with equal or lesser benefits without medical underwriting. Since Plan N is generally considered a step down from Plan G in terms of coverage, someone switching from Plan G to Plan N in a birthday rule state may be able to make that move without health questions. Check with your state insurance department to confirm how your state's birthday rule applies before making any changes.
Pricing for Plan N varies significantly by insurer even though the benefits are identical. Insurance companies use different pricing methods — community rating (everyone pays the same regardless of age), issue-age rating (your premium is based on how old you are when you first enroll), and attained-age rating (your premium increases as you get older). Attained-age rated plans often look cheapest at 65 but can become the most expensive by your 70s and 80s. When comparing Plan N quotes, ask each insurer which pricing method they use and request a projection of how premiums have increased historically. Tools like Medicare.gov's Medigap policy search and your State Health Insurance Assistance Program (SHIP) counselor — available free in every state — can help you compare options without sales pressure.