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Is Medigap Worth It? Costs, Plan N Copays and Oregon Rules

Oregon residents comparing Medigap coverage options

For many people on Original Medicare, yes. Medigap is worth it if you want your health costs to be predictable and you don’t want an unlimited 20% share of a big hospital or specialist bill. It is less clear-cut if you rarely use care and would rather save the premium. The answer comes down to three things: how much risk you can absorb, what you pay in premiums, and when you buy. If you live in Oregon, a fourth matters too: you can shop your policy again every year.

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TL;DR

  • Original Medicare has no yearly cap on what you pay for Part A and Part B services, and Medigap is the product built to fill that gap.
  • The average Medigap premium among current policyholders was $244 a month in 2025, so the question is whether that price buys you enough certainty.
  • Plan N costs less than Plan G in exchange for small copays: up to $20 for some office visits and up to $50 for an ER visit that doesn’t end in admission.
  • Medigap does not cover drugs, dental or vision, so those need separate coverage.
  • Oregon’s birthday rule lets you switch to a same or lesser plan without health questions, which is the main tool for ending overpayment.

Table of Contents

What Medigap actually does

Medigap, also called Medicare Supplement Insurance, is extra insurance you buy from a private company to help pay your share of costs in Original Medicare. That share includes copayments, coinsurance and deductibles. You pay the insurer a monthly premium, and you keep paying your Part B premium to Medicare.

Two details shape the whole decision:

So “is Medigap worth it” is really a question about Original Medicare plus Medigap versus the alternatives, and about how much uncertainty you are comfortable carrying.

What Original Medicare leaves you paying

The case for Medigap starts with what you owe without it. In 2026, the Part B yearly deductible is $283. After that, you usually pay 20% of the cost of each Medicare-covered service or item.

That 20% sounds modest until it is applied to a surgery, an extended specialist course or repeated outpatient treatment. Part A and Part B also have no annual limit on out-of-pocket spending. KFF says that is why many beneficiaries buy Medigap, to protect against unforeseen or catastrophic expenses.

Here is a simple way to think about it:

Situation Original Medicare alone With a comprehensive Medigap plan
Healthy year, a few routine visits You pay the deductible and 20% of what is covered You pay your premiums, with little or no cost-sharing at the point of care
One major event, such as a surgery 20% of Part B costs, with no ceiling Most cost-sharing is paid by the plan, depending on which plan you hold
Several years of ongoing treatment Costs repeat and accumulate Costs stay close to your monthly premium

The table is a framework, not a quote. Exact benefits depend on the plan letter, and you can review each one on Medicare.gov’s plan comparison.

Preventive and diagnostic services are a good example of how bills get complicated. A bone density scan, for instance, can cost very different amounts depending on coverage. Looking at what DEXA scan costs run with and without insurance shows how much one test can vary, and why knowing your cost-sharing in advance has value.

What Medigap costs: the premium side

The other half of the math is the premium. KFF reports that just under half of people in traditional Medicare (46%) had a Medigap policy in 2024. The average monthly premium among current policyholders was $244 in 2025, or $2,926 over a full year.

What Medigap costs: the premium side

Those averages hide a wide range. Age, location and plan type all move the price. KFF also found that premiums among current policyholders rose 7% between 2024 and 2025 and 20% over the five years from 2020 to 2025. Plan G premiums rose 13% in the latest year and 38% over five years.

Two lessons follow:

  1. A policy that was a fair price when you bought it can become expensive without you noticing.
  2. The company you pick on day one is not necessarily the company you should hold ten years later.

That second point is where Oregon residents have an advantage, covered below.

Plan G, Plan N and the other plans

Most of the plan comparison conversation comes down to two letters.

Plan G covers nearly all the gaps in Original Medicare. After you pay the Part B deductible, you generally pay little else for covered care. Plan N has a lower premium and shifts a bit of cost to you at the point of care.

Plan N copays

Plan N pays 100% of Part B coinsurance, with two exceptions. You pay up to $20 for some office visits and up to $50 for emergency-room visits when you aren’t admitted as an inpatient. If you visit a doctor a handful of times a year, those copays are small. If you see specialists often, they add up. We compare the two in more detail in Plan G vs Plan N.

Plan G and Plan N copay comparison

High-deductible and limit-based options

A few other structures exist:

  • High-deductible Plan G or F is offered in some states. You pay Medicare-covered costs up to a $2,950 deductible in 2026 before the policy pays anything.
  • Plan K and Plan L have an out-of-pocket limit, $8,000 for Plan K and $4,000 for Plan L in 2026. After that, the plan pays 100% of covered services for the rest of the calendar year.
  • Plans C and F cannot be bought if you were new to Medicare on or after January 1, 2020.

You can see how these plans are presented locally on our Medicare Supplement plans page.

What Medigap does not cover

Knowing the edges of Medigap keeps you from expecting too much of it. Per NCOA, it does not cover prescription drugs, dental or vision care. NCOA’s Ryan Ramsey notes that Medigap is designed to cover costs for services Medicare covers, not care Medicare doesn’t, and that Original Medicare has no routine dental or vision coverage.

That means a complete setup is usually several pieces:

Long-term custodial care is a separate matter again. A semiprivate nursing home room had a median cost of $114,975 a year in 2025, and long-term care insurance, a separate product, is cheaper the younger you buy it.

Who tends to get the most from Medigap

Medigap tends to fit best when several of these are true:

  • You want a predictable monthly cost rather than bills that vary year to year.
  • You want to see any doctor or hospital that accepts Medicare, without network rules.
  • You have a chronic condition, or a family history that makes a major event plausible.
  • You travel, or you split time between states.
  • You would struggle to absorb an unexpected five-figure bill.

The decision is more personal if you are healthy, rarely see doctors and have the savings to self-insure. Even then, many people choose a lower-premium plan such as Plan N, or a high-deductible option where it is offered, to keep a safety net in place. KFF reports that the share of traditional Medicare beneficiaries with Medigap ranges from 14% in Hawaii to 75% in Iowa, so local habits and plan options clearly play a part.

Timing: the part people regret

Medigap is a decision with a clock on it. NCOA warns that if you miss your initial enrollment window, you may face higher costs or be denied coverage altogether. Outside guaranteed-issue situations, companies in most states can ask health questions.

In Oregon, we walk clients through the window that opens when they first have Part B. Our guides cover what the open enrollment period means in Oregon, how preexisting conditions are handled and guaranteed issue rights if you lose other coverage. If you are leaving a Medicare Advantage plan, read about the disenrollment period before you act. For the broader calendar, see our Medicare enrollment periods guide.

Once you buy, you also get a safety valve: a 30-day free look lets you review a new policy before it is final.

Oregon’s birthday rule: how to stop overpaying

If you already have Medigap and the premium keeps climbing, Oregon gives you a tool most states lack. According to the Oregon Division of Financial Regulation and SHIBA, the birthday rule window starts 30 days before your birthday and ends 30 days after. During that window you can change policies regardless of your health.

The rules to know:

  • You must keep the same plan type or choose one with lesser benefits.
  • New coverage typically starts the first of the month after you apply.
  • Don’t cancel your current policy until the new one is issued.
  • It applies only to Medicare supplement policies issued after January 1, 1990.

The rule exists because of consumer complaints about being locked into plans with large annual rate increases. It gives you a yearly chance to compare prices and switch companies. Oregon is one of 15 states with a birthday rule in 2026.

One catch: if you hold a high-deductible Plan F or G and switch mid-year, the deductible restarts under the new carrier’s policy. Mid-month effective dates are also discouraged, since you typically must give your prior carrier notice. Timing the switch matters, and that is the kind of detail we check with you before you apply.

What the downsides look like in practice

The usual complaints about Medigap are real, so it helps to know how to handle them well:

  • Premiums can be high in some cases. Compare plan letters and carriers, and revisit the price each year. In Oregon, your birthday window is the natural moment.
  • No drug, dental or vision benefits. Pair Medigap with a Part D plan and dental and vision coverage.
  • No use with Medicare Advantage. If you want Medigap, you stay with Original Medicare.
  • Late enrollment can cost more. Start early and use your guaranteed windows.

None of these is a reason to skip the decision. Each is a reason to make it deliberately and with the right timing.

Our perspective

We see the same pattern in Central Oregon every year. People come in worried about choosing wrong, and most of the stress comes from not knowing what Original Medicare leaves open.

Our view is that Medigap earns its place when it turns an open-ended bill into a known monthly number. The best choice is rarely the cheapest premium. It is the plan that matches how you actually use care, from a company whose price you can keep checking.

That is why we teach before we enroll. We lay out Parts A, B, C and D, show where each plan letter fits, and flag your deadlines. If you already have Medigap, we look at it each year around your birthday, because Oregon’s rule gives you a free chance to correct an overpriced policy.

There’s no pressure and no call-center script. You get a local agent who explains the options, and you decide.

Jesse Zimmerman

Get a local second set of eyes

We are a Bend agency that explains Medicare in plain terms, with free consultations in person or remotely. We can help you enroll in Medicare, pick a supplement, or run an annual plan review if your premium has crept up. Start at mountaintopins.com and tell us your birthday and current plan.

A short checklist before you decide

  1. List your expected care: regular specialists, medications, planned procedures.
  2. Add up the Part B deductible, 20% coinsurance exposure and any Plan N copays you could face.
  3. Compare that with the annual premium for each plan letter you are considering.
  4. Confirm your enrollment window and whether you have guaranteed issue rights.
  5. Plan for drugs, dental and vision separately.
  6. If you’re in Oregon and already covered, mark your birthday window each year.

FAQ

Do I really need a Medigap plan?

No, Medigap is optional. But Original Medicare has no yearly cap on Part A and Part B costs, so many people buy it to protect against large bills. Whether you need it depends on your health, savings and comfort with risk.

Is Medigap worth it if I’m healthy?

Often a lower-cost option is the fit. Plan N charges small copays in return for a lower premium, and some states offer high-deductible plans. Healthy beneficiaries can also lose the chance to buy later without health questions, so timing matters as much as price.

What are the out-of-pocket costs with Medigap?

You still pay your Part B premium and your Medigap premium. Plan N adds copays of up to $20 for some office visits and up to $50 for some ER visits. Medigap doesn’t cover drugs, dental or vision, so those costs sit outside it.

Can I switch Medigap plans in Oregon?

Yes. Oregon’s birthday rule gives you a window from 30 days before to 30 days after your birthday. You can move to the same plan type or one with lesser benefits without health questions. Keep your old policy until the new one is issued.

Sources

Disclaimer: This article is for general educational purposes only and does not constitute personalized advice. Medicare rules and plan details change frequently.

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