Plan N vs High Deductible Plan G: Which Saves More?

Plan N and High Deductible Plan G are both designed to do the same thing: lower your Medicare supplement premium. But they work in completely different ways, and choosing the wrong one based on your state, your health, or your risk tolerance can cost you thousands of dollars over time. This is one of the most common questions I get from clients, and the answer is almost never one-size-fits-all.

What Plan N Actually Covers

Plan N is a near-complete Medicare Supplement plan. It covers the Part B deductible ($283 in 2026), and then your only out-of-pocket exposure is a small co-pay — up to $20 when you see a doctor, and up to $50 for emergency room visits (which is waived entirely if you get admitted). That’s it for most people.

One thing that trips people up: those co-pays only apply to actual doctor visits. Lab work, imaging, and preventive visits? No co-pay. So if you’re a relatively healthy person who sees your doctor a handful of times a year, your real out-of-pocket costs under Plan N are going to be modest — a few co-pays here and there, nothing dramatic.

The one gap Plan N has is that it doesn’t cover Part B excess charges. These are the extra amounts a doctor can bill above Medicare’s approved rate. But here’s the reality — about 96% of doctors who accept Medicare also accept Medicare’s approved amounts as payment in full, so excess charges are genuinely rare. And if you live in Connecticut, Massachusetts, Minnesota, New York, Ohio, Pennsylvania, Rhode Island, or Vermont, excess charges are banned entirely by state law. If you’re in one of those states, that gap in Plan N literally doesn’t exist. You can read more about how Medicare Plan G excess charges work and when they actually matter.

How High Deductible Plan G Works — and Where People Get Confused

High Deductible Plan G has the lowest premium of any Medicare Supplement. But before the plan pays a single dollar, you have to meet a deductible of $2,950. That resets every January 1st.

Here’s the part most people misunderstand: it’s not $2,950 worth of medical bills that fills that deductible. Only your 20% coinsurance counts toward it — Medicare’s 80% does not. So if you have a $20,000 surgery, Medicare’s approved amount might be $2,500. You owe 20% of that — $500. That’s what goes toward your deductible, not the $20,000 billed amount.

Do the math on that: to actually hit the full $2,950 deductible, you’d generally need somewhere around $14,000 to $15,000 in Medicare-approved expenses in a single year. For most people, that’s a genuinely bad health year — not a routine one.

Agent Tip

The most common mistake I see with High Deductible Plan G is people assuming any medical bill counts toward the deductible. It doesn’t — only your 20% share of Medicare-approved amounts counts. A $20,000 hospital bill might only put $500 toward your deductible. That changes the risk calculation significantly.

The Premium Gap Is Everything — And It Varies Wildly by State

Here’s where the decision really lives. The premium difference between Plan N and High Deductible Plan G is not the same everywhere, and that gap is what determines which plan actually saves you money.

Take New York. Plan N runs around $300 a month. High Deductible Plan G might be around $70. That’s a $200 to $300 monthly difference — roughly $2,800 a year in premium savings if you go with High Deductible G. To wipe out those savings, you’d need to hit close to the full deductible every single year. In a high-premium state, High Deductible Plan G has a real financial argument.

Now look at Tennessee. Plan N might be $90 a month. High Deductible Plan G might be $40. That’s only a $50 monthly gap — $600 a year. At that spread, Plan N almost always wins with any moderate level of healthcare use. The savings from the lower premium aren’t enough to offset even partial deductible exposure in a bad year.

This is why I always tell clients: Plan G vs. Plan N comparisons that don’t factor in your specific state are incomplete. The math is completely different depending on where you live.

Rate Increase Trends: Both Beat Regular Plan G

One thing most agents don’t talk about enough: both Plan N and High Deductible Plan G have historically had more stable rate increases than regular Plan G. That’s not a coincidence.

Plan N attracts cost-conscious, generally healthier enrollees. When healthier people self-select into a plan, claims stay lower, and insurers don’t have to raise rates as aggressively. High Deductible Plan G takes this even further — because enrollees absorb the first $2,950 themselves, the plan pays out very little in claims, which keeps rate increases among the lowest in the supplement market.

Regular Plan G, by contrast, became the standard guaranteed-issue plan for people who enrolled in Medicare after January 1, 2020. That means people who couldn’t qualify for other plans — often those with more health issues — ended up in Plan G in larger numbers. More claims, higher rate increases. If you want to understand how Medicare Supplement rates increase over time, this dynamic is a big part of the story.

Your HSA Can Work With Either Plan

If you have an existing Health Savings Account balance when you go on Medicare, it doesn’t go to waste. You can’t contribute new money to an HSA once you’re enrolled in Medicare, but you can absolutely spend what’s already there tax-free on either Plan N’s co-pays or High Deductible Plan G’s deductible. Just note that you can’t use HSA funds tax-free to pay your supplement premium itself — only out-of-pocket medical costs qualify.

For someone with a solid HSA balance, High Deductible Plan G becomes even more attractive. You’re essentially paying a very low premium and using pre-tax dollars to cover deductible exposure if a bad year hits.

Plan Switching Is Harder Than Most People Expect

One thing that doesn’t get enough attention in these comparisons: after your initial enrollment window, switching Medicare Supplement plans typically requires medical underwriting. That means health questions, and potentially denial if you have certain conditions. This is not like switching car insurance.

There are exceptions — California and Oregon both have birthday rules that let you switch to a plan with equal or lesser benefits once a year without health questions. If you’re in California, the California Birthday Rule gives you real flexibility most states don’t have. But in most states, your initial supplement choice should be treated as a long-term decision.

That’s especially important when choosing between Plan N and High Deductible Plan G. If you start on High Deductible G and your health changes significantly, switching to Plan N later may not be possible without underwriting. Choose with that reality in mind. Understanding how Medicare Supplement underwriting works before you choose is worth your time.

Agent Tip

I treat the first supplement enrollment as a long-term commitment. If someone is on the fence between Plan N and High Deductible G and isn’t sure about their health trajectory, I almost always lean toward Plan N. If you stay healthy, you pay slightly more in premium — no big deal. If you pick High Deductible G and have a bad year, you’re staring at a $2,950 bill you weren’t expecting. The asymmetry matters.

The Simple Decision Framework

Here’s how I walk clients through this decision:

Choose Plan N if: You live in a state where premiums are relatively low, you use healthcare with any regularity, or you simply want predictable costs without the risk of a large annual deductible. Plan N gives you near-complete coverage with small, manageable co-pays.

Choose High Deductible Plan G only if all three of these apply: You’re in a higher-premium state where the gap between the two plans is $150 or more per month, you’re genuinely healthy with no major conditions on the horizon, and you have at least $2,950 sitting in savings or an HSA that you could use in a bad year without financial stress.

If you’re not sure, Plan N is the safer default. The upside of High Deductible G is real — but only in the right circumstances. If you’d like to see a full side-by-side breakdown, our Plan G vs Plan N comparison goes deeper on the numbers.

Feature	Plan N	High Deductible Plan G
Monthly Premium	Low–Moderate	Lowest
Part B Deductible	Not covered ($283)	Not covered (counts toward plan deductible)
Annual Deductible	None	$2,950
Doctor Co-pays	Up to $20	None (after deductible met)
ER Co-pay	Up to $50 (waived if admitted)	None (after deductible met)
Excess Charges	Not covered	Covered (after deductible)
Rate Stability	Good	Very Good
Best For	Moderate users, lower-premium states	Healthy enrollees, high-premium states, HSA holders

Frequently Asked Questions

Does Plan N cover the Part B deductible?

No. Plan N does not cover the Part B deductible ($283 in 2026). You pay that out of pocket each year. After that’s met, Plan N kicks in with only small co-pays for office and ER visits.

How much do I actually have to spend to hit the High Deductible Plan G deductible?

More than most people think. Only your 20% coinsurance on Medicare-approved amounts counts toward the $2,950 deductible — not the full billed amount. You’d typically need $14,000–$15,000 in Medicare-approved expenses in a single year to hit the full deductible.

Which plan has lower rate increases over time?

Both Plan N and High Deductible Plan G have historically seen more stable rate increases than regular Plan G. High Deductible Plan G tends to have the lowest increases of all, because its enrollees self-select toward good health and the high deductible keeps claims low.

Can I switch from High Deductible Plan G to Plan N later if my health changes?

In most states, no — not without passing medical underwriting. If your health has changed, you may be denied. The exception is states with birthday rules like California and Oregon, which allow annual plan switches without health questions. Treat your initial supplement choice as a long-term decision.

Can I use my HSA to pay Plan N co-pays or the High Deductible Plan G deductible?

Yes. Existing HSA funds can be spent tax-free on both Plan N co-pays and the High Deductible Plan G deductible. You can’t contribute new money to an HSA once you’re on Medicare, and you can’t use HSA funds tax-free to pay your supplement premium — but out-of-pocket medical costs qualify.