Medigap Plan N has quietly become one of the more popular Medicare supplement options for beneficiaries who want solid coverage without paying the highest premiums on the market. It sits in a middle ground that Plan G and Plan F don't occupy — offering nearly comprehensive protection against large medical bills while asking you to absorb a few small, predictable out-of-pocket costs in exchange for meaningfully lower monthly premiums. Understanding exactly where Plan N covers you fully, where it leaves small gaps, and when those gaps could become expensive is the key to deciding whether it belongs in your Medicare strategy.
To understand Plan N, it helps to know what Medicare itself doesn't pay. Original Medicare Part A covers hospital stays but comes with a deductible of $1,676 per benefit period in 2025 — and that deductible resets every time you start a new benefit period, not just once a year. Part B, which covers outpatient care, charges a $257 annual deductible in 2025 and then pays 80% of approved costs, leaving you responsible for the remaining 20% with no out-of-pocket cap. For someone with a serious illness or frequent specialist visits, that 20% can add up to tens of thousands of dollars in a single year. Medigap plans exist to fill those gaps, and Plan N fills most of them.
Specifically, Plan N covers the entire Part A hospital deductible, all 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 coinsurance, the first three pints of blood, and 100% of Part B coinsurance — but only after you've paid the Part B deductible yourself. That last point is important: unlike Plan F (which is no longer available to people who became Medicare-eligible after January 1, 2020), Plan N does not cover the Part B deductible. You pay that $257 yourself each year before Plan N kicks in for outpatient costs.
Once you've met the Part B deductible, Plan N covers your 20% share of Medicare-approved outpatient costs — but with two notable exceptions. First, you'll pay a copay of up to $20 for office visits to a doctor or specialist. Second, if you visit an emergency room and are not admitted to the hospital as an inpatient, you'll pay a copay of up to $50. If the ER visit results in inpatient admission, that $50 copay is waived. These copays are capped at those amounts by federal standardization rules, so no insurance company can charge you more than $20 for an office visit or more than $50 for an outpatient ER visit under a Plan N policy. For beneficiaries who see their primary care doctor a handful of times a year, these copays might total $60–$100 annually — far less than the premium savings Plan N typically delivers compared to Plan G.
The second gap in Plan N coverage is more consequential for some beneficiaries: excess charges. Medicare sets an approved payment rate for every covered service. Doctors who accept Medicare assignment agree to accept that rate as payment in full. But doctors who do not accept assignment — sometimes called non-participating providers — can legally bill you up to 15% more than Medicare's approved rate. That extra 15% is called an excess charge, and Plan N does not cover it. Plan G and Plan F do cover excess charges. In practice, the majority of U.S. physicians — roughly 97% — do accept Medicare assignment, so excess charges are not a widespread problem. However, if you live in a state where a significant number of specialists or physicians opt out of Medicare assignment, or if you travel frequently and see out-of-network providers, excess charges could become a real expense. You can check whether a specific doctor accepts Medicare assignment at Medicare.gov's physician compare tool before your appointment.
Premium differences between Plan N and Plan G vary considerably by age, gender, location, and the insurance company offering the plan, but the gap is real and consistent. A 65-year-old woman in a mid-sized Midwestern city might pay $110–$140 per month for Plan N versus $150–$200 per month for Plan G from the same insurer. Over a full year, that's a potential savings of $480–$720. Over five years, that's $2,400–$3,600 staying in your pocket — money that could offset many years' worth of office visit copays. The math tends to favor Plan N for beneficiaries who are relatively healthy, see their doctors a predictable number of times per year, and primarily use physicians who accept Medicare assignment.
All Medigap plans, including Plan N, are standardized by the federal government, meaning the benefits described above are identical regardless of which private insurance company sells you the plan. What differs between companies is the premium, the customer service reputation, and the method used to calculate future premium increases. Insurance companies use one of three pricing methods: community rating (everyone pays the same premium regardless of age), issue-age rating (your premium is based on your age when you buy the policy and doesn't increase just because you get older), and attained-age rating (your premium increases as you age). Attained-age policies often have the lowest initial premiums but can become significantly more expensive in your 70s and 80s. When comparing Plan N quotes, always ask which pricing method the insurer uses — it matters more over a decade than the initial monthly premium difference.
Enrollment timing is critical with Medigap. Your best opportunity to buy any Medigap plan, including Plan N, without medical underwriting 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 conditions. Outside this window, insurers in most states can use medical underwriting, which means they can reject your application or charge higher premiums based on your health history. If you miss your open enrollment window, switching to Plan N from another plan — or buying Plan N for the first time — may require you to answer health questions and could result in denial.
There are exceptions to the underwriting rules. Certain qualifying events trigger a Guaranteed Issue right, meaning insurers must sell you a Medigap policy without underwriting. These include losing employer-sponsored coverage, your Medicare Advantage plan leaving your service area, or your Medicare Advantage plan being discontinued. Additionally, thirteen states have enacted what's known as the birthday rule, which gives Medigap policyholders a 30-day window around their birthday each year to switch to a plan with equal or lesser benefits from any insurer 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 currently have Plan G, you could potentially switch to Plan N during your birthday window without health questions — locking in lower premiums if your health has changed since you first enrolled.
Plan N is not the right fit for everyone. Beneficiaries who frequently see specialists, live in areas with higher concentrations of non-participating Medicare providers, or have chronic conditions requiring many outpatient visits per year may find that the copays and potential excess charge exposure erode the premium savings. For those individuals, Plan G's higher premium may deliver better value by eliminating all cost-sharing above the Part B deductible. On the other hand, beneficiaries who are in good health, have predictable and modest healthcare utilization, and primarily use providers who accept Medicare assignment are strong candidates for Plan N's lower-premium structure.
One practical step before choosing Plan N is to estimate your typical annual healthcare usage. Count the number of office visits you made in the past year, multiply by $20, and add that to the $257 Part B deductible. Compare that total to the annual premium difference between Plan N and Plan G in your area. If your estimated Plan N out-of-pocket costs plus the Plan N premium are still lower than the Plan G premium alone, Plan N is likely the better financial choice for your situation. You can get quotes for both plans through your state's State Health Insurance Assistance Program (SHIP), which provides free, unbiased counseling. To find your local SHIP counselor, visit shiphelp.org or call 1-800-MEDICARE.
It's also worth noting that Medigap plans do not include prescription drug coverage. Regardless of which Medigap plan you choose, you'll need to enroll separately in a Medicare Part D prescription drug plan to get help with medication costs. Part D plans are sold by private insurers and vary significantly in premiums, formularies, and pharmacy networks. The Annual Enrollment Period from October 15 through December 7 each year is when you can join, switch, or drop a Part D plan, with coverage changes taking effect January 1. Failing to enroll in Part D when you're first eligible can result in a late enrollment penalty — 1% of the national base beneficiary premium for every month you went without creditable drug coverage — added permanently to your monthly Part D premium.
Medigap Plan N represents a genuine middle path in the supplement market — not a budget plan that leaves you exposed to catastrophic costs, and not the most expensive option that covers every conceivable gap. For the right beneficiary, it delivers substantial financial protection against the costs that sink many seniors' budgets — hospital stays, skilled nursing care, and the uncapped 20% Part B coinsurance — while keeping monthly premiums at a level that makes long-term affordability realistic. The key is doing the math specific to your own health usage and provider network before you sign up.