Medigap Plan G vs. Plan N in Idaho: Which Wins?

How does Medigap standardization work?

Every Medigap plan letter is standardized by federal law: a Plan G sold by one insurance company covers exactly the same benefits as a Plan G sold by any other. The company can't add sweeteners or quietly trim coverage. The only things that differ between carriers are the premium, the rate-increase history, and the customer service.

This is honestly one of the best consumer protections in all of insurance, and it makes shopping refreshingly simple. When you buy a Medicare Supplement, you're choosing two things: a letter and a company. The letter determines what's covered. The company determines what you pay for it.

The letters run from A through N, each with a fixed benefit chart published by Medicare. Some letters are collectors' items at this point — barely sold, barely worth discussing. In practice, the modern Medigap market has narrowed to a short list, and for people newly aging into Medicare, the real decision is almost always Plan G versus Plan N, with high-deductible Plan G as the budget-minded third option.

Why does standardization matter so much for this particular decision? Because it means the G-versus-N question is a pure math-and-preferences problem. There's no fine print to out-lawyer, no "well, this carrier's Plan N is better than that one's." You compare two fixed benefit charts, weigh the premium difference, and think about how you actually use healthcare. That's the whole game — and it's exactly the kind of comparison we love doing across the kitchen table.

One more foundation stone before we dig in: Medigap plans work alongside Original Medicare. Medicare pays first, your Medigap plan pays second, and you cover whatever's left per your plan's chart. If you're still deciding between this whole approach and Medicare Advantage, start with our companion guide, Medicare Advantage vs. Medicare Supplement in Idaho, then come back here for the finals.

Why can't new enrollees buy Plan F anymore?

Plan F closed to anyone newly eligible for Medicare after January 1, 2020, because Congress decided first-dollar coverage — plans that pay every deductible so enrollees never see a bill — encouraged overuse of care. Plan F covered the Part B deductible; the law now prohibits selling that feature to new enrollees, which took F (and Plan C) off the menu.

For years, Plan F was the best-seller — the "covers absolutely everything" plan. Then the Medicare Access and CHIP Reauthorization Act (MACRA) drew a line in the calendar. If you became eligible for Medicare before 2020, you can still buy or keep Plan F. If you aged in after, it's simply not available to you, no matter how nicely you ask.

Here's the thing, though: losing Plan F wasn't much of a loss. Plan G is identical to Plan F in every way except one — it doesn't cover the annual Part B deductible, which is $283 for 2026. That's it. That's the entire difference. And historically, Plan F premiums have often exceeded Plan G premiums by more than $283 a year, meaning many Plan F owners were effectively paying extra for the privilege of not writing one small check.

There's also a quieter, longer-term issue for those still holding F: it's a closed pool. No new, younger, healthier 65-year-olds can join it. As that pool ages, its claims rise, and premiums tend to follow. If you own Plan F today, nobody can take it from you — but it's smart to compare your renewal rate against Plan G quotes during your Idaho birthday window each year (more on that rule below).

So Plan G inherited the throne as the most comprehensive plan a newly eligible Idahoan can buy. And Plan N stepped up as its scrappy, lower-priced challenger. Which brings us to the actual contenders.

What does Plan G cover?

Plan G covers every gap in Original Medicare except one: the annual Part B deductible, which is $283 for 2026. Pay that once each year, and Plan G handles essentially everything else Medicare-approved — hospital deductibles, the 20% coinsurance, excess charges, skilled nursing coinsurance, and even 80% of emergency care during foreign travel.

Let's spell out what "everything else" means, because it's a genuinely impressive list:

• Part A hospital deductible — $1,736 per benefit period in 2026. Plan G pays it. This is the gap that stings people most, because you can owe it more than once in a year.
• Part A coinsurance and extended hospital days — covered, plus an additional 365 hospital days after Medicare's benefits run out.
• Part B coinsurance — the famous uncapped 20%. Covered in full after the Part B deductible.
• Part B excess charges — the up-to-15% surcharge some providers can add. Covered (and we'll unpack this in a minute, because it's the heart of the G-vs-N debate).
• Skilled nursing facility coinsurance — covered.
• First three pints of blood, Part A hospice coinsurance — covered.
• Foreign travel emergencies — 80% covered, up to plan limits, after a small deductible.

Live on Plan G for a year and your medical cost-sharing is, for all practical purposes, $283. One deductible, then quiet. No copays at the doctor's office. No coinsurance math. No opening bills with one eye closed. That predictability is why Plan G has become the default recommendation from a lot of agents — though "default" and "right for you" aren't always the same thing, which is why Plan N deserves a fair hearing.

Remember, Medigap plans don't cover prescriptions — you'll pair G (or N) with a standalone Part D drug plan, where 2026's $2,100 annual out-of-pocket cap keeps the drug side predictable too.

What does Plan N cover?

Plan N covers everything Plan G covers, with two exceptions: you pay small copays — up to $20 for office visits and up to $50 for emergency room visits that don't end in admission — and Plan N doesn't cover Part B excess charges. In exchange, Plan N premiums run meaningfully lower than Plan G's, often by $25–$45 a month in Idaho.

Read that benefit list again from the Plan G section — the Part A deductible, the 20% coinsurance, skilled nursing, foreign travel — because Plan N covers all of it identically. The plans are siblings, not strangers. The differences fit in a coat pocket:

• Office visit copay: up to $20 per visit. Not $20 plus coinsurance — just a copay, like the ones you likely paid all through your working years.
• Emergency room copay: up to $50, waived if you're admitted to the hospital.
• Part B excess charges: not covered. If a non-participating provider bills above Medicare's approved amount, that surcharge is yours.
• The Part B deductible ($283 in 2026): not covered — but Plan G doesn't cover it either, so this is a tie, not a difference.

That's the entire delta. Plan N is not "lesser coverage" in any catastrophic sense — a $200,000 hospital year is handled just as completely by Plan N as by Plan G. What Plan N does is shift a little cost back to you at the point of routine care, in exchange for a permanently lower premium. Whether that trade pays off depends on two questions: how often do you see the doctor, and how do you feel about the excess-charges wrinkle? Let's take the scary-sounding one first.

What are Part B excess charges, really — and should Idahoans worry?

Part B excess charges are surcharges of up to 15% above Medicare's approved amount, billed by the minority of providers who don't accept Medicare assignment. They're uncommon — the large majority of providers nationally accept assignment and can't bill them — but a handful of states ban them outright, and Idaho is not one of them. So in Idaho: uncommon, but possible.

Here's how the machinery works. Doctors relate to Medicare in one of two main ways. "Participating" providers accept Medicare assignment, meaning they take Medicare's approved amount as payment in full — no excess charges, ever. "Non-participating" providers can charge up to 15% above the approved amount (a limit set by federal law), and that surcharge is the excess charge. Per CMS, the overwhelming majority of clinicians who bill Medicare are participating providers, which is why most people never see an excess charge in their lives.

Some states — Ohio and Massachusetts among them — prohibit excess charges entirely. Idaho doesn't. We'd be doing you a disservice to pretend otherwise, and an equal disservice to turn it into a bogeyman. The honest framing: excess charges are uncommon but possible in Idaho.

Three practical points take most of the fear out of it:

• You can check ahead. Medicare.gov's provider tool shows whether any doctor accepts assignment. One search before a new specialist visit settles the question.
• The exposure is bounded. An excess charge is at most 15% of Medicare's approved amount for a service — not 15% of a hospital bill. On a $300 approved charge, that's up to $45.
• It only applies to Part B services from non-participating providers. Hospitals' Part A charges aren't part of this conversation.

Our experience in the Treasure Valley: clients who ask their providers almost always hear "yes, we accept assignment." But if the mere possibility of a surprise surcharge would nag at you — some people's peace of mind is worth more than the math — that's a legitimate point for Plan G. Just make the choice with the real odds in view, not the brochure-level fear.

How do Plan G, Plan N, and high-deductible Plan G compare?

Side by side, the three plans share the same backbone — full coverage of Medicare's big gaps — and differ only at the edges: N's small copays and excess-charge exposure, and high-deductible G's annual deductible in exchange for a much smaller premium. Here's the full chart for the 2026 plan year.

Notice how much of that table is the word "Covered," three times in a row. That's the standardization story again: you're not choosing between strong and weak coverage. You're choosing between three pricing structures wrapped around the same core protection. High-deductible G, the quiet third option, is the same Plan G chart with a velvet rope: you self-fund Medicare's cost-sharing until you hit an annual deductible in the high-$2,000s (the figure adjusts each year — check Medicare.gov for the current number), and the plan takes over from there. It's catastrophic coverage at a lawn-sprinkler premium, and for cash-comfortable folks it deserves a look.

What's the premium difference worth? The break-even math

The break-even is simple: take the annual premium savings of Plan N and divide by $20 to see how many office visits it would take to give those savings back. With a typical $35-per-month gap, Plan N saves $420 a year — meaning you'd need over 20 copay-triggering visits before Plan G's price starts looking better.

Say you're 65, live in Nampa, and get these hypothetical quotes: Plan G at $150 per month and Plan N at $115 per month. (Illustrative Idaho-range numbers for the 2026 plan year — not quotes from any actual carrier. Your quotes will differ by age, county, and company.) Here's the arithmetic laid bare:

Walk through that middle row. Six office visits — a pretty normal year of primary care and a specialist or two — costs you $120 in Plan N copays. You saved $420 in premium to get there. You're $300 ahead, and that's money in your pocket every single year the gap holds. Even a heavy year of monthly appointments leaves N ahead. The break-even sits at about 21 copay-triggering visits per year, which is nearly two a month. Most retirees aren't in that neighborhood; some absolutely are.

Two honest caveats to the math. First, ER copays and any excess charges nudge the break-even down a bit. Second, the premium gap is what matters, and it varies: if your quotes show G and N only $15 apart, N's case weakens; at $45 apart, it's compelling. Here's how the illustrative monthly premiums stack up visually:

How does Idaho's birthday rule change the G-vs-N calculus?

Idaho's Medigap birthday rule — an annual window of roughly 63 days starting around your birthday to switch plans without medical underwriting — only permits moves to equal or lesser benefits. That makes G-to-N a protected, anytime-later option, while N-to-G requires passing health questions. In other words: starting with G keeps both doors open; starting with N locks one.

This rule, in place since March 2022 per the Idaho Department of Insurance, quietly reshapes the whole decision. In most states, choosing between G and N is close to a one-shot game: whatever you pick in your six-month open enrollment window, you'd better like, because changing plans later means underwriting. Idaho deals you a better hand.

Consider the asymmetry as a strategy question:

• Start with Plan G: Every year, during your birthday window, you can keep G (shopping it to a cheaper carrier — same letter counts as equal benefits), or step down to N if the premium gap has grown and your health usage is light. No health questions either way. Maximum flexibility.
• Start with Plan N: Your birthday window lets you shop N to other carriers, or step further down. But climbing up to G means underwriting — and if your health has changed by then, that climb may be expensive or unavailable.

Does that mean everyone should start with G? Not quite — flexibility has a price, namely G's higher premium, and the break-even math above doesn't stop being true. If N saves you $400 a year and you bank those savings for a decade, you've built a real cushion. But if you're on the fence — genuinely torn between the two — the birthday rule is a legitimate tiebreaker in G's favor for Idahoans, because the fence stays climbable in only one direction.

Either way, mark your birthday window on the calendar. Even if you never change letters, re-shopping your same plan letter across carriers every year is how Idahoans keep their premiums honest. It's the rare insurance chore that routinely pays for the ten minutes it takes. We track the windows for our clients — one of the perks of having a local Medigap agent instead of an 800 number.

What about rate increases over time?

Every Medigap premium rises over time — through age-based increases, carrier-wide rate actions, or both — so the quote you get at 65 is a starting point, not a promise. What separates carriers is their track record: some raise rates modestly and steadily, others lure with low initial quotes and catch up later.

This is the part of Medigap shopping that a benefit chart can't show you. Two carriers can quote the same Plan N $20 apart today, and the cheaper one can cost more within five years. When we compare carriers, we look at their history of rate increases in Idaho — information filed with the Idaho Department of Insurance — and we weigh a slightly higher stable premium against a teaser rate with a spiky past.

A few structural things worth knowing:

• How premiums are priced matters. Most Idaho Medigap policies are attained-age rated, meaning premiums rise as you get older, on top of any across-the-board increases. Ask how any quote is priced.
• Closed pools drift upward. This is Plan F's long-term problem: no new 65-year-olds can join, so the pool ages and claims climb. Plan G and Plan N both remain open to new enrollees, which helps keep their pools balanced.
• The birthday rule is your pressure valve. In most states, a bad rate-increase streak means underwriting your way out or eating it. In Idaho, you can walk to a competitor once a year, no questions asked. Carriers know this, and it keeps the market more honest here than in much of the country.

Does G or N fare better on increases? It varies by carrier, and anyone who claims a universal answer is guessing. What we can say: because Plan N's copay structure filters out some small-claim activity, some carriers price its increases a touch more gently — but that's a tendency, not a law. This is exactly why we compare, every time, with current Idaho filings in front of us.

Who should pick Plan G?

Plan G fits people who want the fullest coverage money can currently buy, hate variable costs of any size, see doctors frequently, or want to preserve maximum flexibility under Idaho's one-way birthday rule. If your idea of a good insurance year is never thinking about your insurance, Plan G is your letter.

The Plan G profile, in plain terms:

• You're a frequent flyer at the clinic. Ongoing conditions, regular specialists, physical therapy — when visits stack up, N's copays erode its savings and G's flat simplicity shines.
• You want zero billing surprises. One $283 deductible for 2026, then silence. No copay at check-in, no excess-charge asterisk, nothing to track.
• You value the option to downgrade later. Under Idaho's birthday rule, G-to-N is always available without underwriting. G is the choice that keeps choosing open.
• You see out-of-state or specialty providers. Assignment status varies more once you're consulting specialists far from home; G makes the question irrelevant.
• The premium gap in your quotes is small. If G and N land within $15–$20 a month of each other, the math tilts toward just buying the fuller coverage.

Who should pick Plan N?

Plan N fits people who are comfortable with small, capped copays in exchange for permanently lower premiums, use routine care moderately, and are willing to confirm that their providers accept Medicare assignment. If you like keeping a few hundred extra dollars a year and don't mind a $20 copay now and then, N is your letter.

The Plan N profile:

• You're a light-to-moderate healthcare user. A physical, a couple of follow-ups, the occasional specialist — your copay total stays far below your premium savings.
• You like math on your side. At a typical $30–$40 monthly gap, N banks $360–$480 a year. Over a decade of retirement, that's real money, hypothetically speaking — your gap will vary.
• Your providers accept assignment. A five-minute check on Medicare.gov (or one question to the front desk) largely neutralizes the excess-charge concern — remember, excess charges are uncommon in Idaho, just not impossible.
• You'd otherwise be tempted by Medicare Advantage's low premiums. N is the middle path: Medigap's go-anywhere freedom and catastrophic protection, at a friendlier monthly price.
• You're settled on your choice. You understand that in Idaho, moving up to G later means underwriting, and you're at peace with that.

And how do we help you land on one? The same way we approach every plan decision: CarrieAnne's 6-area comparison method. We line up total costs, your providers, your medications, extra coverage needs, your travel plans, and future flexibility — then let the winner emerge from your facts, not our preferences. Once a letter wins, you get a full presentation of that plan before you commit. If you're just starting your Medicare journey, our turning-65 Medicare checklist for Idaho shows where this decision fits in the bigger sequence.

Frequently asked questions

Related reading

• Medicare Advantage vs. Medicare Supplement in Idaho: Which Is Right for You?
• The 2026 Medicare Part D Guide
• Turning 65 in Idaho: Your Complete Medicare Checklist

CarrieAnne Kowalczyk

CEO & Licensed Agent, Personal Touch Ins. & Benefits, LLC · NABIP Treasure Valley Legislative Chair · AHIP · CMIP · HAFA

CarrieAnne has been comparing Medicare, health, and life insurance options for Idahoans since 2005. Her signature 6-area comparison method turns overwhelming choices into clear ones — with zero pressure, ever. Meet the whole team →

We do not offer every plan available in your area. Currently we represent 5 organizations which offer 300 products in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options.

Premium figures and break-even examples in this article are illustrative for the 2026 plan year, not quotes. Actual Medigap premiums vary by carrier, age, county, tobacco status, and plan year. Sources: CMS, Medicare.gov, Idaho Department of Insurance, and SHIBA (Idaho's SHIP program).