The Clearing Method Method

If you only have a few minutes

At 65, you face a decision unlike any insurance decision you’ve made before. One choice — between Original Medicare with Medigap and Medicare Advantage — quietly determines what every other Medicare decision means. The window to choose freely is six months. In most of the country, after that window closes, the option to switch to the more flexible path may be gated by medical underwriting. Roughly half of Medicare Advantage enrollees leave their initial plan within five years, and the people most likely to want to leave are the people whose health has changed.

This page is an attempt to teach the decision in the order the decision actually works — starting with the one piece of Medicare that has no analog in your prior life.

If your situation includes Medicaid, employer coverage past 65, VA healthcare, or you are already enrolled in Medicare Advantage — or if you are reading this for someone else — there is a companion page for special situations linked at the end of this page that addresses each of those directly.

---

Where this starts

There is a particular kind of tired that comes from researching Medicare.

Maybe you’ve been at it for an evening, or a few weekends, or the better part of a year. You’ve watched the videos, sat through the webinars, talked to a few people, written down terms you didn’t know and then watched them blur together. You came in thinking it would be paperwork. You’ve discovered it’s a language.

This page was written for the moment you put the laptop down.

Why Medicare feels harder than it should

Here is what we think is going on.

Medicare is a series of choices, but one of them organizes all the others. Most guides won’t tell you that, because the conventional sequence — Part A, Part B, Part C, Part D — treats every piece as equal. They are not equal. One of them is structurally different from anything you’ve encountered before, and the rules around it quietly determine what every other Medicare choice means.

Almost nobody teaches it in this order. We will explain why later in this page. For now, what matters is that the reason Medicare feels harder than it should isn’t that you’ve been reading the wrong sources. It’s that nearly all the sources teach it in the same order, and that order is wrong for the decision you actually have to make.

The piece almost nobody leads with

The piece is Medicare Supplement Insurance. Most people call it Medigap.

It is private insurance. It exists because Original Medicare — the government program your taxes have been paying into your whole working life — does not have an out-of-pocket maximum on most of what it covers. There is no ceiling. A long hospital stay or a serious illness can produce bills that don’t stop scaling. Medigap closes that gap.

The right to buy a Medigap policy without medical questions lasts six months from the date you enroll in Medicare Part B. After that window, in most states, an insurer can ask medical questions and decide not to sell you a policy. Per Medicare.gov’s official guidance, only four states require continuous guaranteed-issue protection year-round, with about a dozen others offering partial windows tied to birthdays or other events. In the rest, the door closes when the six months end.

That sentence is unlike any insurance sentence you’ve encountered before. We will come back to why.

Why Medigap is unlike anything else you have ever bought

You have had insurance your whole adult life. Auto insurance, home insurance, life insurance, health insurance through work. They are all different in their specifics, but they share a structural pattern: there is a baseline of protection, a way to add more if you want it, a renewal cycle, and — crucially — a path back if your circumstances change. Pre-65 health insurance, after the Affordable Care Act, has guaranteed-issue protections that mean you can re-enter coverage even if your health declines. Auto and home insurance use assigned-risk pools when private carriers won’t write you. Life insurance gets harder and more expensive over time, but rarely impossible until very late.

In every one of those categories, the second chance exists. Sometimes it is expensive. Sometimes it is a hassle. But it exists.

Medigap is the first major insurance category in American adult life where the second chance, in most states, can simply be denied.

There is also no employer analog. When you had health insurance through work, you didn’t think about supplemental coverage because the employer plan combined hospital, outpatient, prescription, and catastrophic protection into one product. The plan covered what it covered, and what it didn’t cover was usually a deductible or a copay — finite numbers, predictable. The idea of buying a separate private policy to fill structural holes in your primary coverage simply wasn’t part of the experience.

So when you encounter Medigap at 65, you encounter an object that has no precedent in your prior insurance life. It is private but standardized by federal law. It is optional but financially essential for many people on Original Medicare. The window to buy it freely is short. The penalty for missing the window is, in most of the country, permanent.

This is not a deficiency in your understanding. It is the structure of the object itself.

The next obvious question

So here is the next question, and it’s the one most readers ask out loud once they understand what Medigap is: how do I actually get it? And while we’re at it — does Medicare Advantage include Medigap? Because the simplicity of “one plan, one card” is appealing, and if Medicare Advantage somehow includes the protection Medigap provides, that would solve the timing problem entirely.

It does not. And the reason it does not is the most consequential structural fact in the entire Medicare landscape.

Why Medigap and Medicare Advantage cannot coexist

Medicare Advantage and Medigap cannot be held at the same time. Federal law — specifically Section 1882 of the Social Security Act, codified at 42 U.S.C. § 1395ss — prohibits an insurance company from selling you a Medigap policy if you are enrolled in a Medicare Advantage plan, except in narrow circumstances tied to switching back to Original Medicare.

The prohibition is not arbitrary. It reflects the structure of the products themselves. Medigap is a wrap around Original Medicare’s specific cost-sharing — the 20% Part B coinsurance with no cap, the Part A hospital deductible, the daily coinsurance amounts. When you are enrolled in Medicare Advantage, you are not on Original Medicare. You are on a private plan with its own cost-sharing structure: deductibles, copays, prior authorization, network rules, and a federally-capped out-of-pocket maximum. There are no “Medigaps” left for Medigap to fill. The product literally cannot do what it is designed to do.

So Medicare Advantage and the Medigap-supplemented version of Original Medicare are not variants of the same system. They are alternative systems. You pick one path. You do not pick both.

The two paths, described honestly

Both paths are legitimate. Both are chosen by millions of Americans every year. Each is genuinely good at things the other is not. Here is what each actually involves.

Path 1: Original Medicare + Medigap + a standalone Part D drug plan.

Three separate products. Three separate monthly premiums. Three administrative relationships. Higher monthly cost — Medigap Plan G premiums for a healthy 65-year-old run roughly $150 to $250 per month in most states, plus Part D premiums of roughly $30 to $60 per month. Predictable out-of-pocket exposure: once you have paid the Part B deductible, Plan G covers nearly everything else. Any provider in the country who accepts Medicare. No prior authorization on most services. Portable — your coverage works the same in every state.

Path 2: Medicare Advantage.

One plan. One card. One premium — often $0 in addition to your Part B premium. Lower monthly cost in most cases. Network restrictions on which providers you can see. Prior authorization required for many procedures, including specialist visits and certain medications. A federally-capped out-of-pocket maximum that protects against catastrophic exposure: in 2025, $9,350 in-network per CMS. Often includes dental, vision, hearing, and fitness benefits that Original Medicare does not. Plans are local — your network and benefits depend on where you live and may not work the same way if you move.

The catastrophic protection of Medicare Advantage is real. It is not the same as Medigap’s, but it is real. The simplicity is real. The lower cost is real. The bundled benefits are real. We are not telling you Path 2 is the wrong choice. We are telling you it is one of two paths, and the rules around switching between them are not symmetric.

What people are actually choosing

In 2025, more than half of all Medicare beneficiaries — 54%, or 34.1 million people — are enrolled in Medicare Advantage, per KFF and MedPAC’s March 2024 report. Enrollment has grown from roughly 19% of beneficiaries in 2007 to a majority of beneficiaries today. Among new enrollees specifically, the Medicare Advantage share is even higher.

Path 2 is not the fringe choice. It is the modal choice. Whatever you decide, you are deciding among the same set of options most of your peers are deciding among. The page is not arguing that Path 2 is wrong. It is showing you that the data on what happens after the choice is information the choice deserves.

What the data shows about what happens next

The largest study of Medicare Advantage disenrollment to date, published in JAMA Health Forum in 2023, followed 82 million Medicare Advantage enrollees from 2011 to 2020. Five-year findings:

• 48.3% of nondually-enrolled and 53.4% of dually-enrolled MA beneficiaries had left their initial contract within five years. Most switched to a different MA plan; a smaller fraction switched back to Original Medicare.
• Disenrollment rates rose with comorbidity burden — beneficiaries with the highest comorbidity scores had a 54.0% five-year disenrollment rate, compared with 48.1% for the lowest.
• A separate JAMA Network Open 2025 study on long-stay nursing home residents found disenrollment-to-Original-Medicare rates were several times higher among MA enrollees who developed long-term care needs than among healthier enrollees.

The pattern is consistent across the studies: when people on Path 2 develop serious health needs, a meaningful fraction try to leave. And when they try to leave, the decision they made years earlier — before they knew they would be sick — determines whether the door is open.

In the four states with continuous guaranteed-issue protection (Connecticut, Maine, Massachusetts, New York), the door stays open. In Vermont and Washington, partial protections apply. In a growing number of states with birthday-rule windows of 30 to 63 days each year — California, Idaho, Illinois, Kentucky, Louisiana, Nevada, Oregon, and roughly a dozen others as of 2026 — the door opens briefly on a regular schedule, with restrictions on which plans you can switch to. In the remaining states, the door is gated by medical underwriting. The insurer can ask about your health and decline to sell you a policy.

For MA enrollees who don’t develop serious health needs, the underwriting question may never come up. The risk is structural, not statistical: it is the foreclosure of an option, not a guarantee of harm. But for the subset of enrollees who most want to leave — the ones whose health has changed — the option to return to the Medigap-protected version of Original Medicare may not exist where they live.

The heuristic this decision punishes

Most consequential decisions in adult life have a built-in second chance. If your auto premiums climb after a claim, you can shop carriers. If your homeowner’s insurance drops you, the assigned-risk pool exists. If your pre-65 health insurance changed during job transitions, the ACA marketplace gave you a path back. We have all developed, over decades, a reasonable heuristic: I’ll deal with it when I need to.

Medicare is the first place that heuristic stops working reliably.

The data above shows what happens to people who use it: roughly half of Medicare Advantage enrollees try to leave their initial plan within five years, and the people most likely to want to leave are the people whose health has changed. For most of them, in most states, the door back to Original Medicare with Medigap protection is gated by medical underwriting.

The heuristic that has served you well your entire adult life — wait and see, deal with it when it matters — is the heuristic this decision punishes.

This is not a moral claim. It is a structural one. The decision is genuinely different from the decisions that came before it.

Why the path with more protection feels harder to set up

If Medigap protection matters this much, why does getting it feel so much harder than enrolling in Medicare Advantage? The honest answer has three parts, and the page is committed to telling you all three.

First, the structural complexity is real. Medigap requires assembling three separate products from three different sources. You enroll in Original Medicare (Parts A and B) through Social Security. You buy a Medigap policy from a private insurer, separately. You enroll in a standalone Part D prescription drug plan from a different private insurer, separately. You pay three monthly premiums to three different entities. Medicare Advantage bundles all of this into one product with one bill. The simplicity of MA at enrollment is not a marketing illusion. It is a real administrative difference.

Second, the marketing infrastructure is asymmetric. Medicare Advantage plans pay broker commissions that are substantially higher than Medigap commissions, and Medicare Advantage receives risk-adjusted capitation payments from CMS that fund extensive marketing — television advertising, mailers, telephone outreach. A March 2025 Senate Finance Committee investigation led by Senator Ron Wyden documented rapid growth in MA spending on marketing middlemen. CMS’s 2024 rule attempting to flatten broker compensation incentives was struck down by federal court in August 2025 on statutory authority grounds. Medigap is sold through quieter channels with smaller marketing budgets. Some of what feels harder about Medigap is genuinely structural; some of it is the absence of an industry incentive to make it easy.

Third, and most importantly: the simplicity of Medicare Advantage is partly real and partly deferred. Medicare Advantage front-loads the simplicity and back-loads the complexity. Provider networks can change year to year. Prior authorization is required for many procedures — per KFF’s 2024 analysis, MA plans processed 46.2 million prior authorization requests in 2022 and denied 7.4% of them, a denial share that has risen each year since 2019. Out-of-pocket maximums protect you, but they can still reach $9,350 in-network in 2025. And — most consequentially — if your health changes and you want to return to Original Medicare with Medigap protection, the door may not be open anymore.

Medigap front-loads the complexity. Medicare Advantage defers it. The complexity is roughly conserved between the two paths. The question is when you would rather encounter it — and whether you want the second-chance door to remain open.

A note on cost

Medigap costs meaningfully more per month than most Medicare Advantage plans. For some readers, the monthly cost difference — often $2,000 to $3,000 per year between paths — will be the deciding factor, and that is a legitimate decision based on your current financial reality. Path 2 exists in part because Path 1 is unaffordable for many beneficiaries. This page is not arguing that you should pay more than you can afford. It is arguing that you should know what each monthly premium difference is buying you, including the structural option-value that doesn’t appear on either bill.

If cost is the primary constraint, your state’s State Health Insurance Assistance Program (SHIP) — also called HICAP in California — can walk through Medicare Savings Programs, Extra Help for Part D, and other cost-reduction options that may apply to your situation. Counseling is free. Counselors are trained, certified, and not paid by carriers.

Why nobody else teaches it in this order

The argument of this page — that Medigap is the conceptual lens that organizes the entire Medicare decision, and that the timing rules around it deserve the lead position — is not a particularly novel observation among people who have studied the program closely. So why is this page necessary? Why isn’t the same argument the opening of every Medicare 101 webinar, every government brochure, every broker conversation?

The answer is structural, not a matter of competence or intent.

Government sources cannot lead with Medigap as the organizing concept, because Medigap is a private product and government sources — Medicare.gov, CMS publications including the annual Medicare & You handbook, and the federally-funded SHIP counseling network — operate under mandates of neutrality about private products. SHIP’s authorizing framework, administered by the Administration for Community Living, explicitly defines its mission as objective and unbiased counseling. A SHIP counselor cannot open a session by telling you “Medigap is the conceptual key to the whole system.” That would be advocating for a private product category, outside their authorization. SHIP teaches the facts. SHIP cannot teach the sequence.

Carrier-paid sources have commercial incentive not to lead with the second-chance problem. Medicare Advantage plans pay higher broker commissions and receive risk-adjusted CMS payments that fund extensive marketing. Leading with “the choice you make at 65 may foreclose your option to switch later” would slow MA enrollment growth, which is the strategic priority for most large carriers. The omission is legal under current CMS marketing guidelines. It is also the reason the second-chance problem rarely appears in MA marketing material.

Advocacy nonprofits come closest, but their structural posture is rights-neutral, not pedagogically-sequenced. Organizations like the Medicare Rights Center and the Kaiser Family Foundation produce excellent, accurate Medicare information. Their posture is to defend beneficiary rights and inform the public. It is not to argue that one piece of the system organizes the rest. That argument is a pedagogical claim, not a rights claim, and it is not what their funding is for.

What this leaves is a teaching gap. The order of operations that serves the reader best — Medigap as concept, then implementation, then the fork between paths, then the timing rules as the decision-forcing constraint — is functionally unavailable from the institutions that teach Medicare to most Americans. Not because they are incompetent or compromised. Because the structural constraints on what they can say are different from the structural constraints on what serves the reader.

A reader-funded publication with no carrier money and no government mandate to be neutral about private products is one of the few entities that can teach this in this order. That is what this publication is, and that is what this page is for.

What we are actually teaching

There is a sentence we have come back to throughout the development of this publication. It is the simplest articulation of what we think is wrong with conventional Medicare education and what we are trying to do differently.

We teach you the role your employer used to play, before we teach you anything about Medicare itself.

For most of your adult life, an HR department made decisions about supplemental coverage on your behalf. They selected which baseline plan to offer, what supplemental layer to bundle with it, what catastrophic protection to include, and how to communicate the package to you. You experienced the result, not the assembly. The result felt like a single thing called “health insurance.” The assembly was invisible.

At 65, the assembly becomes your job. There is no HR department. The federal government provides one component (Original Medicare). The private market provides the supplemental layer (Medigap, or alternatively, Medicare Advantage as a substitute system). The decisions HR used to make — what to bundle, what to exclude, what risks to insure against, what timing rules to navigate — are now decisions you have to make. Almost no one tells you this. Most Medicare education leaps directly into the lettered parts as if you have always known how to assemble health insurance from components. You have not. You have always experienced it as a finished product.

This is what we mean by the role your employer used to play. It is the role of assembly. The boring work of matching components, evaluating supplemental layers, understanding the gaps. Until that role is named — until it is taught as a job that someone else used to do for you and now falls to you — Medicare reads as a list of options instead of a system of construction.

The lettered parts, the timing rules, the fork between paths, the cost trade-offs — all of it is the work of assembly. Once you understand that, the rest of the system becomes legible.

Closing posture

This page does not sell Medicare Supplement Insurance. It does not sell Medicare Advantage. It does not receive any payment from any carrier for any product. It is funded by readers and by no one else.

What it does is try to teach Medicare in the order the decision actually works, with the data that supports the structural argument, in a voice that does not flatten complexity into urgency or simplify hard choices into wrong answers. Both paths are legitimate. Both are chosen by millions. The choice is yours, and it is genuinely difficult, and you are not failing for finding it difficult.

If you want one-on-one guidance on your specific situation — what plans are available where you live, what your Initial Enrollment Period dates are, whether you qualify for cost-reduction programs, what to do if you are already in Medicare Advantage and reconsidering — your state’s SHIP counselor is free, trained, and not paid by carriers. We recommend them not because they will tell you what we would tell you, but because they cannot. Their structural neutrality is exactly what makes them useful as a complement to this page. We argue the sequence. They walk through the specifics. Both are needed.

The years ahead are long. The decisions made at the start of them deserve to be made in the right order, with the right information, by readers who understand what the choice is actually about.

This page is one attempt at that.

---

Special situations companion page

A companion page covering special situations — dual-eligible, employer coverage past 65, VA healthcare, already enrolled in Medicare Advantage, or reading on behalf of someone else — is in development.