What is Medicare Advantage?

Medicare Advantage, also called Part C, is offered by private insurance companies approved by Medicare. It usually combines Part A, Part B, and often Part D prescription drug coverage.

What is the difference between Original Medicare and Medicare Advantage?

Original Medicare is run by the federal government and lets you use any provider that accepts Medicare. Medicare Advantage is offered by private insurers and often uses provider networks.

What is Medicare Supplement or Medigap?

Medicare Supplement, also called Medigap, works with Original Medicare to help reduce out-of-pocket costs. It can help cover certain copays, coinsurance, and deductibles.

Does Medigap include prescription drug coverage?

Medigap plans sold today do not include prescription drug coverage. Most people need a separate Medicare Part D plan for medications.

What is Medicare Part D?

Medicare Part D is prescription drug coverage offered by private insurance companies approved by Medicare. It helps cover medication costs based on the plan’s formulary.

When is the Medicare Annual Enrollment Period?

The Medicare Annual Enrollment Period usually runs from October 15 to December 7 each year. During this time, many people can review or change Medicare Advantage and Part D plans.

Can I switch Medicare Advantage plans later?

Yes, but timing matters. Most people can switch during Annual Enrollment, Medicare Advantage Open Enrollment, or a qualifying Special Enrollment Period.

What is the difference between HMO and PPO Medicare Advantage plans?

HMO plans usually require in-network care and may need referrals. PPO plans generally offer more provider flexibility but may cost more for out-of-network care.

Do Medicare Advantage plans require prior authorization?

Many Medicare Advantage plans require prior authorization for certain services. This can include imaging, surgeries, skilled nursing care, or other covered treatments.

Do Medicare Advantage plans have an out-of-pocket limit?

Yes, Medicare Advantage plans include an annual maximum out-of-pocket limit for covered medical services. Original Medicare does not include this protection by itself.

Why do Medicare plans change every year?

Plans may update premiums, copays, drug formularies, provider networks, and benefits each year. Reviewing your plan annually helps avoid unexpected changes.

How can I find a Medicare plan that includes my doctor?

You should check the plan’s provider network before enrolling. A local Medicare agent can help confirm whether your doctors and hospitals are included.

IRMAA is an income-related adjustment that can increase Medicare Part B and Part D premiums. It is based on your reported income from prior tax years.

What is a Special Enrollment Period?

A Special Enrollment Period allows certain Medicare changes outside normal enrollment windows. Qualifying events may include moving, losing coverage, or plan changes.

Why work with a local Medicare agent?

A local Medicare agent can help compare plan options, explain networks, and review coverage based on your area. This can make Medicare decisions easier to understand.

The Medicare GLP-1 Bridge Ends in 18 Months. Here’s How to Make Sure You Keep What You Gained.

July 3, 2026

By Paul Barrett, CMIP | The Modern Medicare Agency | Melville, NY Published: July 2026

The Medicare GLP-1 Bridge launched July 1, 2026. If you qualify, you can now get Wegovy, Zepbound, or Foundayo for $50 a month. For many Medicare beneficiaries, this is life-changing access to medications that were previously out of reach.

But here’s the question nobody in the Medicare world is asking yet — and they should be:

What happens to you on January 1, 2028?

That’s when the Bridge ends. No guaranteed extension. No clear congressional path to permanent coverage. If you start Wegovy in July 2026 and lose 40 pounds by the end of 2027, then the program closes and the drug costs $400–$700 a month cash — what do you do?

Some people will find a way to continue. Many won’t.

The research is clear that most people who stop GLP-1 medications without a plan regain significant weight. The cardiometabolic benefits — lower blood pressure, better blood sugar control, reduced cardiovascular risk — tend to reverse in proportion to how much weight comes back.

But here’s what the same research also shows: the people who do keep their results share specific, actionable habits. This isn’t a mystery. It’s a protocol. And the 18 months you have on the Bridge is exactly enough time to build it.

I’m not a doctor and this isn’t medical advice. But I am someone who has spent 18 years in Medicare watching what happens when people plan ahead versus when they don’t. And I’m an active competitive athlete in my mid-fifties who thinks seriously about how the body works and how to take care of it for the long term.

This is the article I wish someone had written when the Bridge launched.

First: The Honest Data on What Happens When People Stop

Let’s start with the reality, because sugarcoating it doesn’t help anyone.

Clinical trials paint a sobering picture. The landmark STEP 4 trial of semaglutide (Wegovy) and the SURMOUNT-4 trial of tirzepatide (Zepbound) both showed the same pattern: when the drug is stopped, weight comes back — and it comes back quickly. On average, participants in controlled trials regained roughly two-thirds of their lost weight within a year of stopping. The cardiometabolic improvements — reduced blood pressure, improved blood sugar, lower cardiovascular risk markers — reversed proportionally with the weight regain.

The discontinuation rate itself is striking: up to 65% of people who start GLP-1 medications stop within the first year, most often due to cost, side effects, or insurance changes.

But the real-world story is more nuanced — and more hopeful.

A Cleveland Clinic analysis of nearly 8,000 patients — one of the largest real-world GLP-1 studies to date — found that 45% of patients who stopped their medication maintained meaningful weight loss at one year. That’s almost half. The clinical trials show roughly a third maintaining results. Why the gap?

Two reasons. First, real-world patients who stopped tended to have lost less weight than trial participants to begin with, making maintenance easier. Second — and this is the critical point — real-world patients didn’t simply stop the drug and do nothing. They continued pursuing weight management through other means: switching medications, resuming GLP-1 therapy at lower doses when possible, or adopting structured lifestyle changes.

The people who kept their results had a plan. The people who didn’t, mostly didn’t keep their results.

The Hidden Risk Nobody Is Talking About: Muscle Loss

Here is the part of the GLP-1 story that deserves far more attention — especially for Medicare beneficiaries, who are predominantly 65 and older.

GLP-1 medications work by suppressing appetite dramatically. You eat significantly less. You lose weight. But here’s the biological reality: when the body loses weight rapidly, it doesn’t lose only fat. It also loses lean body mass — muscle.

In the landmark STEP 1 semaglutide trials, participants lost an average of 15% of their body weight. Roughly 39% of that lost weight was lean mass, not fat. On high-efficacy GLP-1 doses, some studies show an average lean mass decline of 10–15% in patients losing more than 15% of body weight.

For a 65-year-old, this is not an abstract concern.

Natural aging already causes skeletal muscle loss of 12–16% over a lifetime. Up to half of adults over 80 experience sarcopenia — the clinical term for age-related muscle wasting that drives falls, fractures, loss of independence, and mortality. The combination of rapid, GLP-1-induced weight loss and pre-existing age-related muscle decline can create what researchers call sarcopenic obesity: a state where a person achieves a “normal” BMI but has severely compromised body composition — too little muscle to support daily function, despite looking thinner on the scale.

The Harvard Science Review described this plainly in February 2026: “When an older adult with pre-existing, age-related muscle decline uses a GLP-1 agonist without structured intervention, they risk developing sarcopenic obesity… the sudden drop in muscle mass accelerates mitochondrial dysfunction and oxidative stress at the cellular level, essentially mimicking the biological markers of rapid aging.”

This doesn’t mean older adults shouldn’t use these medications. The cardiovascular, metabolic, and quality-of-life benefits are real and meaningful. It means they should use them with a plan — one that actively counters muscle loss throughout the 18-month Bridge period.

What Actually Works: The Protocol for Keeping Your Results

The research is reasonably consistent on what separates people who maintain GLP-1 results from those who don’t. None of this is complicated. All of it requires intentionality.

1. Protein — More Than You Think, Starting Day One

The most evidence-backed intervention for preserving muscle during GLP-1 therapy is adequate protein intake. Current 2026 clinical guidelines recommend 1.2–1.6 grams of protein per kilogram of body weight per day for adults on GLP-1 medications. For a 180-pound person, that’s roughly 98–130 grams of protein daily.

The challenge: GLP-1 medications suppress appetite dramatically. Many people find themselves eating very little — which means protein intake often falls below what the body needs to protect muscle. The result is that more of the weight lost comes from muscle rather than fat.

The solution is deliberate. Prioritize protein at every meal, even when you’re not hungry. Lean proteins — chicken, fish, eggs, Greek yogurt, cottage cheese — should anchor every meal. If whole food sources feel like too much, a quality protein supplement can bridge the gap.

Registered dietitian nutritionists can reduce GLP-1 discontinuation rates by 5–10% in clinical settings. If your doctor prescribes you a GLP-1 through the Bridge program, ask for a referral to a dietitian at the same appointment. Treating it as optional is a mistake.

2. Resistance Training — Non-Negotiable, Not Optional

Research presented at the European Congress on Obesity in 2025 found that adults taking GLP-1 drugs were able to retain muscle while losing weight by doing two things: strength training and eating enough protein. Both were necessary. Neither was sufficient alone.

Current guidelines recommend 2–3 resistance training sessions per week during GLP-1 therapy. This doesn’t mean powerlifting or gym memberships you won’t use. It means:

Bodyweight exercises: squats, pushups, step-ups, resistance band work
Light dumbbell work targeting major muscle groups
Water aerobics or resistance-based pool exercise for anyone with joint limitations
Chair-based strength exercises for those with mobility constraints

The goal is to send the body a signal: keep this muscle. We’re using it. Don’t sacrifice it for energy.

For Medicare beneficiaries, many Medicare Advantage plans cover gym memberships through programs like SilverSneakers, Silver&Fit, or One Pass. If you’re on an Advantage plan, check your benefits — you may already be paying for access you’re not using. This is the moment to use it.

3. Don’t Lose Too Fast — Slower Is Smarter for Older Adults

The velocity of weight loss matters, especially over 65. Rapid weight loss accelerates muscle loss. The goal is not to lose as much as possible in 18 months. The goal is to lose fat while preserving muscle — which often means a more moderate pace than the drug’s maximum effect.

Talk to your doctor about starting at the lowest effective dose and titrating slowly. This is not the approach most people take — the tendency is to maximize the dose for maximum results. For younger adults in good health, that math may work. For older adults already managing some degree of age-related muscle loss, slower titration with active muscle preservation strategies is the smarter approach.

4. Build the Habits During the 18 Months — Not After

This is the strategic insight that matters most for Bridge participants.

The Bridge gives you 18 months of appetite suppression. During that window, eating less feels easy — the drug is doing the work. The critical mistake is using those 18 months only to lose weight without simultaneously building the habits that will maintain the weight loss without the drug.

Think of the Bridge as a scaffolding, not a permanent structure. The scaffolding makes construction possible. But when the scaffolding comes down, the building needs to stand on its own.

By the end of 2027, before the Bridge closes, you want to have:

A protein intake habit that feels automatic
A resistance training routine that’s genuinely part of your week
A dietary pattern you can sustain without extreme restriction
A relationship with food and appetite that doesn’t require pharmaceutical support to maintain

None of this happens by accident in 18 months. It happens by design, starting now.

5. Have a Conversation With Your Doctor About What Comes Next — Before December 2027

This is the one action item most Bridge participants won’t take — and the most important one.

Twelve months from now, ask your doctor: “If the Bridge program doesn’t continue after December 2027, what’s our plan?” The answer might be:

Transition to a lower maintenance dose — some patients do well on significantly lower doses than their therapeutic weight-loss dose. The cost math changes at a lower dose.
Manufacturer direct-pay programs — Novo Nordisk and Eli Lilly have both developed lower-cost direct-purchase options. Under the Trump administration’s TrumpRx initiative, negotiated prices through manufacturers may be available.
Alternative medications — older GLP-1 medications (liraglutide, dulaglutide) are available at lower cost, including generics in some cases. They’re less potent but may be sufficient for maintenance.
Endoscopic procedures — emerging research from Digestive Disease Week 2026 showed that endoscopic sleeve gastroplasty — a non-surgical stomach volume reduction — produced significantly better post-GLP-1 weight maintenance than lifestyle modification alone in patients who stopped their medication.
The lifestyle protocol above — for patients who have genuinely built the habits during their 18 months, discontinuation doesn’t have to mean regain.

The worst outcome is getting to December 31, 2027, having lost significant weight and improved your health, and then watching those gains reverse because nobody planned for what came next.

The Cardiometabolic Benefits: What Stays and What Goes

One more piece of data worth understanding clearly.

The SURMOUNT-4 post-hoc analysis showed that among people who regained 75% or more of their lost weight after stopping tirzepatide, cardiometabolic markers — blood pressure, blood sugar, cardiovascular risk factors — had returned essentially to baseline by week 88. The benefits reversed with the weight.

This is the argument for maintenance. If you lose 30 pounds on Wegovy and your blood pressure normalizes, your prediabetes resolves, and your cardiovascular risk score improves — and then you stop the drug and regain 25 pounds — most of those health gains are gone. The Medicare system pays for the results of obesity-related disease: the cardiac events, the diabetes management, the kidney disease progression. The Bridge is an attempt to prevent that spending upstream. But the prevention only holds if the results hold.

The patients who benefit most from the Bridge program over the long run will be the ones who use it as a catalyst — not a cure.

A Note on Why This Article Exists

I write about Medicare. But I’m also a certified personal trainer with a degree in Physical Education, several nutrition courses under my belt, and a Health Coaching certificate from the Institute for Integrative Nutrition.

Health and fitness has been a passion of mine my entire life — and as I’ve gotten older, that passion has shifted from performance to something I think matters even more: staying strong, functional, and genuinely capable of enjoying the life you worked so hard to build.

That shift didn’t happen in a vacuum. It happened because of my clients.

After 18 years in Medicare, I’ve sat across from hundreds of people who spent their careers looking forward to retirement — the travel, the grandkids, the golf, the garden — and arrived there physically unable to enjoy it. Not because of a sudden illness. Because of a slow, quiet erosion of strength, mobility, and energy that nobody warned them about and nobody helped them address.

That’s what I think about when I read the research on GLP-1s and muscle loss in older adults. I don’t see an abstract statistic. I see the people I work with every day — people who deserve better than losing 40 pounds, feeling incredible, and then watching it reverse because the program ended and nobody gave them a plan for what came next.

I’m also an active competitive athlete in my mid-fifties. I play softball and basketball. I take recovery, muscle preservation, and long-term physical capacity seriously — not as a hobby, but as a commitment I make to myself so I can keep showing up fully for my clients, my family, and my own life.

The Medicare GLP-1 Bridge is genuinely good news. Eighteen months of $50 access to clinically proven weight loss medications is something millions of Americans needed and didn’t have. I don’t want to dampen that.

But I also don’t want anyone to start Wegovy in July 2026, lose 35 pounds, feel better than they have in years, and then watch it all come back in 2028 because nobody told them what to do next.

That’s what this is for.

Summary: Your 18-Month Action Plan

When	What to Do
Month 1 — Now	Talk to your doctor, get prior authorization submitted, confirm eligibility, get a dietitian referral
Month 1–3	Start the drug, establish protein targets (1.2–1.6g/kg/day), begin resistance training 2–3x/week
Month 3–6	Review progress with your doctor, adjust dose if losing too fast, check your Advantage plan’s gym benefits
Month 6–12	Solidify lifestyle habits — these should feel routine by now, not effortful
Month 12	Have the “what happens after December 2027” conversation with your doctor
Month 15–18	Evaluate post-Bridge options: manufacturer programs, alternative medications, maintenance dose, lifestyle plan
December 31, 2027	Bridge ends — your plan is already in place

Questions? Let's Talk.

I help Medicare beneficiaries think through their coverage options — including how the GLP-1 Bridge interacts with your current Part D plan, your Medicare Advantage benefits, and what plan changes might make sense as this program evolves.

If you have questions about eligibility, coverage, or plan interactions — or if you just want to make sure your Medicare coverage is the right fit heading into 2027 — call me. No charge, no pressure.

Paul Barrett, CMIP The Modern Medicare Agency 📞 631-358-5793 ✉️ medicare@paulbinsurance.com 🌐 paulbinsurance.com 📍 445 Broad Hollow Rd, Melville, NY 11747

Related reading:

Sources:

Disclaimer: This article is for educational and informational purposes only. It does not constitute medical, nutritional, or fitness advice. Consult your physician before starting or stopping any medication, and consult a registered dietitian or certified fitness professional regarding nutrition and exercise programming. The Modern Medicare Agency is not connected with or endorsed by the United States government or the federal Medicare program.

What Is Medicare Part B and What Does It Actually Cover?

The complete guide to Medicare’s medical insurance — every service it covers, exactly what it costs in 2026, how it works with group insurance and VA benefits, and the excess charges most people have never heard of until they get a surprise bill.

The Short Answer

Medicare Part B is medical insurance — it covers doctor visits, outpatient care, preventive services, durable medical equipment, and more. Unlike Part A, Part B is not premium-free for anyone: everyone pays a monthly premium (202.90in2026formostpeople),anannualdeductible(283), and 20% coinsurance on most covered services, with no yearly cap on that 20% under Original Medicare alone. Whether you need to enroll at 65, and whether delaying is safe, depends heavily on your employment status and your employer’s size — getting this wrong is one of the most consequential and permanent mistakes in all of Medicare.

Key Takeaways

Part B is never premium-free — everyone pays a monthly premium, and higher earners pay significantly more through IRMAA.
The 20% coinsurance under Original Medicare alone has no yearly cap — this is the single biggest financial risk in Medicare, and it’s the reason Medigap and Medicare Advantage exist.
Whether you can safely delay Part B without a penalty depends on your employer’s size: 20+ employees generally allows delay; fewer than 20 generally does not.
Missing your enrollment window triggers a permanent 10% penalty for every 12-month period you went without coverage.
Veterans can and generally should enroll in Part B even with VA benefits, since Medicare and VA coverage don’t coordinate — each only pays for care received within its own system.
“Excess charges” from non-participating providers can add up to 15% on top of what Medicare approves, and only some Medigap plans protect you from them.

What Part B Actually Covers

While Part A handles hospital room and board, Part B is the half of Original Medicare that covers medical care and most services delivered outside a hospital admission — doctor visits, outpatient procedures, and ongoing medical needs.

What’s covered

Doctor visits — primary care and specialists
Outpatient surgeries and procedures
Diagnostic lab work, X-rays, and MRIs
Emergency room visits
Ambulance services
Outpatient mental health care
Physical, occupational, and speech therapy
Chemotherapy and radiation received in an outpatient clinic
Durable Medical Equipment (DME) — wheelchairs, oxygen equipment, blood sugar monitors, walkers, and similar equipment
Ambulatory surgical center services

Preventive services: the part Medicare gets genuinely right

Most preventive services are covered at 100%, with no deductible and no copay, as long as your provider accepts Medicare assignment. This includes:

Your one-time “Welcome to Medicare” wellness visit, available within your first 12 months on Part B
Annual wellness visits after that
Flu shots and most other recommended vaccines
Mammograms
Colonoscopies and other cancer screenings
Diabetes and cardiovascular screenings
Many other screenings recommended by the U.S. Preventive Services Task Force

Paul’s Honest Take: This is one of the most underused parts of Medicare, full stop. I’ve had clients who paid for a private physical every year out of habit and never realized their annual wellness visit through Medicare was completely free. If you haven’t used your Welcome to Medicare visit or your annual wellness visit, that’s real value sitting on the table.

What’s NOT covered

Routine dental care — cleanings, fillings, dentures, extractions
Routine vision exams and eyeglasses
Hearing aids (though diagnostic hearing tests ordered by a doctor may be covered)
Long-term custodial nursing home care — help with daily living activities, as opposed to short-term skilled or medical care
Routine prescription drugs you pick up at a retail pharmacy — that’s Part D’s job, not Part B’s
Cosmetic surgery, unless medically necessary (such as reconstruction after an accident or mastectomy)
Most care received outside the United States, with very limited exceptions
Routine foot care, such as nail trimming, in the absence of a qualifying medical condition
Acupuncture, except for a narrow, specific chronic low back pain benefit
Concierge medicine fees and membership-style charges some practices add on top of standard care
Long-term care insurance-style services, including most home-based personal care that isn’t tied to a skilled medical need

Paul’s Honest Take: The dental and vision exclusions are the ones that surprise people most, especially since they’re such routine parts of healthcare for most adults. This is exactly why so many Medicare Advantage plans build dental, vision, and hearing benefits into their coverage — Original Medicare was simply never designed to include them, and that gap doesn’t go away on its own.

What Part B Costs in 2026

Part B has three separate cost components, and understanding all three matters:

Cost Component	2026 Amount
Standard monthly premium	$202.90
Annual deductible	$283
Coinsurance on most covered services	20%

The premium is deducted automatically from your Social Security check if you’re already collecting benefits. If you’re not yet collecting Social Security, you’ll receive a bill, typically every three months.

The deductible works differently than Part A’s — it’s a straightforward annual figure. You pay the first $283 of Medicare-approved outpatient costs each calendar year, and then Medicare’s cost-sharing kicks in.

The coinsurance is where the real risk lives. After your deductible is met, Medicare pays 80% of the Medicare-approved amount for most covered services, and you’re responsible for the remaining 20%. There is no yearly cap on this 20% under Original Medicare alone. If you have a $100,000 course of cancer treatment, your 20% share is $20,000 — unless you have a Medigap policy or Medicare Advantage plan absorbing that cost.

Paul’s Honest Take: I put this in bold because it’s genuinely the single most important number in this entire guide. That uncapped 20% is the whole reason Medigap and Medicare Advantage exist as products in the first place. Original Medicare by itself was never designed to protect you from a truly expensive year — it was designed to cover 80% of it and leave the rest to you.

IRMAA: What Higher Earners Actually Pay

If your income is above certain thresholds, you’ll pay more for Part B through the Income-Related Monthly Adjustment Amount (IRMAA) — based on your tax return from two years prior. For 2026, that means your 2024 income determines your premium tier.

2024 Income (Individual)	2024 Income (Married, Joint)	Total Part B / Month
$109,000 or less	$218,000 or less	$202.90
$109,001 – $137,000	$218,001 – $274,000	$284.10
$137,001 – $171,000	$274,001 – $342,000	$405.80
$171,001 – $205,000	$342,001 – $410,000	$527.50
$205,001 – $499,999	$410,001 – $749,999	$649.20
$500,000 and above	$750,000 and above	$689.90

At the top tier, you’re paying more than three times the standard premium. If your income has recently dropped — retirement, the loss of a spouse, or certain other life-changing events — you can appeal your IRMAA determination using Form SSA-44.

Do You Have to Enroll? And What Happens If You Don’t?

Technically, Part B is optional — Medicare won’t force you into it. But opting out without a valid alternative is genuinely risky, because of how the penalty structure works.

If you don’t sign up during your Initial Enrollment Period (the 7-month window around your 65th birthday) and you don’t have qualifying employer coverage, you’ll face a permanent 10% penalty added to your premium for every full 12-month period you went without Part B. That penalty doesn’t expire — you pay it for as long as you have Part B, which for most people means for the rest of your life.

Example: If you delayed enrollment by 24 full months without a valid exception, you’d pay an extra 20% on top of the standard $202.90 premium in 2026 — roughly $40.58 more, every month, permanently.

How Part B Works with Group Insurance

Just like Part A, whether you can safely delay Part B without penalty comes down to one specific number: how many employees your company has.

Companies with 20 or more employees: If you or your spouse are actively working and covered by a genuine group health plan, your workplace insurance is primary, and you can legally delay Part B without any penalty. When that employment or coverage eventually ends, you get an 8-month Special Enrollment Period to enroll in Part B penalty-free.

Companies with fewer than 20 employees: Medicare automatically becomes your primary insurer at 65, regardless of your employment status. You need to enroll in Part B right on schedule. If you don’t, your small employer’s plan can legally refuse to pay claims that Medicare should have covered first — potentially leaving you responsible for the full cost.

Paul’s Honest Take: I say this in nearly every guide I write, because it’s genuinely one of the costliest misunderstandings I encounter: “I have good coverage at work” and “I’m protected from Medicare’s enrollment deadlines” are two completely different statements, and whether the second one is true depends entirely on your employer’s size — not how generous the coverage feels. Confirm the actual employee count before you decide to delay anything.

Retiree Coverage Is Not the Same as Active Employer Coverage

This is a distinction that catches a genuinely large number of people off guard: the “20 or more employees” exception only applies to active employment. If you retire and your former employer offers you retiree health benefits — sometimes a genuinely good, comprehensive plan — that coverage does not create a Special Enrollment Period the way active group coverage does, and it does not exempt you from enrolling in Part B on time.

Paul’s Honest Take: I’ve seen this mistake more than once, and it’s an especially painful one because it happens to people who did everything right during their working years. Someone retires with a strong retiree health plan from a large employer, assumes it works the same way their active coverage did, and delays Part B — only to find out later that retiree coverage was never a valid reason to delay in the first place. The moment you stop actively working, that clock starts, regardless of how good your retiree plan looks on paper. If you’re retiring and keeping employer retiree benefits, treat enrolling in Part B as something to handle right on schedule, not something retiree coverage lets you postpone.

Why You Need Both Part A and Part B for Medigap or Medicare Advantage

Here’s a foundational requirement worth understanding clearly, since it shapes every other coverage decision in Medicare: you must be enrolled in both Part A and Part B before you can buy a Medigap policy or enroll in a Medicare Advantage plan. Neither product exists as a standalone substitute for Original Medicare — both are built specifically to work alongside it.

Medigap fills the cost-sharing gaps left by Original Medicare (Parts A and B) — it has nothing to fill in if you’re not enrolled in both parts to begin with.
Medicare Advantage legally must provide at least the same coverage as Parts A and B combined, which is only possible because you’re required to be enrolled in both before a Medicare Advantage carrier can enroll you.

Paul’s Honest Take: This surprises people who assume they can somehow “skip” Part B and go straight into a Medicare Advantage plan to avoid the extra premium. It doesn’t work that way — Part B enrollment, and its premium, is a prerequisite either way, whether you end up on Original Medicare with Medigap or on a Medicare Advantage plan. There’s no path through Medicare that avoids the Part B premium once you’re actually using the system.

Does Medicare Work If You’re a Veteran?

Yes — and if you have VA health benefits, understanding how the two systems relate is genuinely important, because they work differently than most people assume.

Medicare and VA benefits do not coordinate. These are two entirely separate systems that each pay only for care received within their own network. Medicare doesn’t pay for care you receive at a VA facility, and VA benefits don’t pay for care you receive from a non-VA doctor or hospital. You, the veteran, choose which system to use each time you seek care.

Here’s the critical point: having VA benefits does not exempt you from Medicare’s enrollment deadlines. VA coverage is not considered a qualifying reason to delay Part B without penalty. If you don’t enroll in Part B during your Initial Enrollment Period and you’re relying solely on VA benefits, you can still trigger the permanent late enrollment penalty.

Why the VA itself recommends enrolling in Medicare anyway:

It gives you access to civilian doctors and hospitals outside the VA system
VA healthcare funding depends on annual Congressional appropriations, which isn’t guaranteed to remain stable
If VA authorizes only part of your needed care at a non-VA facility, Medicare can help cover the rest
Having both gives you meaningfully more flexibility and security than relying on either system alone

Paul’s Honest Take: This is one of the most common misconceptions I run into with veterans specifically, and it’s an expensive one to get wrong. Good VA coverage feels like it should be enough, and it might genuinely handle most of your care — but it doesn’t protect you from the Part B enrollment clock the way employer coverage from a large company can. The VA itself actively encourages enrolling in Medicare Parts A and B for exactly this reason. If you have VA benefits and are approaching 65, this is worth a direct conversation before you assume you’re covered.

Veterans who enroll in Part B can also purchase a Medigap policy, which can be particularly valuable if you use non-VA providers regularly — though if you primarily rely on VA facilities for most of your care, the value of an added Medigap policy may be more limited, and worth weighing carefully.

How Long Does It Actually Take to Get Part B Approved?

This is one of the most practical, and most overlooked, pieces of planning — especially if you’re leaving a job after 65 and coordinating your Part B start date around the end of your employer coverage. Applying isn’t instant, and the timeline depends heavily on which enrollment window you’re using.

Enrollment Situation	Typical Processing Time	When Coverage Actually Starts
Initial Enrollment Period (around 65)	2–4 weeks, sometimes up to 6	1st of your birthday month (if applied in the 3 months before) or 1st of the month after you apply (if applied during or after your birthday month)
Special Enrollment Period (leaving employer coverage)	4–8 weeks, sometimes longer	1st of the month after your application is submitted
General Enrollment Period (Jan 1–Mar 31, missed window)	4–6 weeks	1st of the month after you apply

Why the Special Enrollment Period takes longer: applying after leaving employer coverage requires two forms, not one — Form CMS-40B (the actual Part B application) and Form CMS-L564 (Request for Employment Information), which your employer needs to complete to verify you had qualifying coverage. Social Security has to manually review both, which is exactly why this route consistently takes longer than a standard Initial Enrollment Period application.

Paul’s Honest Take: This timeline question comes up constantly with clients who are retiring or leaving a job after 65, and it deserves real attention — not just because of the penalty risk we’ve already covered, but because a slow approval can leave you with an actual gap in coverage if you time it too tightly. My standard advice: start this process at least 2 to 3 months before you need Part B to actually begin, not the week your employer coverage ends. If your former employer is slow to complete their portion of Form CMS-L564, that alone can hold up the entire application — so it’s worth following up with your HR or benefits department directly rather than assuming it’s been submitted.

Practical tips to avoid delays

Apply online through SSA.gov whenever possible. It’s consistently the fastest method — mailed or faxed forms are more prone to getting lost or delayed.
If you’re on a Special Enrollment Period, submit Form CMS-L564 alongside Form CMS-40B, not separately. They need to arrive together, and one incomplete form can stall the whole application.
Expect a short intake lag even with online applications. It can take several business days for an online submission to actually appear on a local Social Security agent’s screen — don’t panic if you call shortly after applying and they say they don’t see it yet.
Once approved, you don’t have to wait for your physical card. Your Medicare Beneficiary Identifier typically appears in your online Social Security or Medicare.gov account within a day or two of approval, and you can print a temporary card from there — the physical card generally arrives by mail within about 30 days.

Excess Charges: The Cost Almost Nobody Knows to Ask About

Here’s a detail that surprises even people who’ve been on Medicare for years: not every doctor who accepts Medicare agrees to accept Medicare’s approved amount as full payment.

Providers fall into three categories:

Participating providers accept Medicare assignment, meaning they agree to accept the Medicare-approved amount as payment in full. This covers the vast majority of providers — roughly 98% of doctors nationally.
Non-participating providers still accept Medicare patients but haven’t agreed to accept the standard rate. They can charge an excess charge of up to 15% above the Medicare-approved amount.
Opted-out providers have left the Medicare system entirely and can charge whatever they want under a private contract — Medicare pays nothing at all for care from these providers, except in emergencies.

How excess charges actually work: if the Medicare-approved amount for a service is $300 and you see a non-participating provider, they can legally charge up to an additional $45 (15%) on top, for a total bill of $345 — and that excess amount doesn’t count toward your Part B deductible.

Eight states currently prohibit or limit excess charges entirely: Connecticut, Massachusetts, Minnesota, New York, Ohio, Pennsylvania, Rhode Island, and Vermont. If you live in one of these states, you’re generally shielded from excess charges from providers within your state — though you could still face them if you receive care from a non-participating provider elsewhere.

Paul’s Honest Take: This is exactly why Medigap Plan G matters so much for people who want maximum flexibility. Plan G covers excess charges in full — Plan N does not. If you’re the kind of person who wants the freedom to see any doctor without worrying about billing surprises, that distinction is worth understanding clearly before you pick between the two. And regardless of which plan you choose, it’s always worth asking a new provider directly whether they accept Medicare assignment before your first appointment.

The HSA Rule: Part B Closes the Door Too

If you’re hoping to keep contributing to a Health Savings Account, know this clearly: enrolling in Part B — or any part of Medicare — ends your ability to make new HSA contributions. This isn’t unique to Part B; it applies the moment you enroll in Medicare in any form, including premium-free Part A.

If keeping your HSA active matters to you, the only way to legally delay both Part A and Part B is through qualifying employer coverage — which, as covered above, generally requires an employer with 20 or more employees. And because Part A enrollment can be backdated up to 6 months once you do enroll, it’s smart to stop HSA contributions 6 months before you plan to sign up for Medicare or file for Social Security, whichever comes first.

Frequently Asked Questions

Is there a cap on what I’ll pay for Part B services in a year? Not under Original Medicare alone — the 20% coinsurance has no yearly limit. A Medigap policy or Medicare Advantage plan is what actually caps your exposure.

What happens if I don’t sign up for Part B on time? You’ll generally face a permanent 10% penalty on your premium for every 12-month period you went without coverage, unless you qualify for a Special Enrollment Period through active employer coverage.

Do I need Part B if I have good coverage through a small employer? Almost certainly yes. If your employer has fewer than 20 employees, Medicare becomes your primary insurer at 65 regardless of your job coverage, and not enrolling can leave you exposed to unpaid claims and a lifelong penalty.

Do veterans need Medicare Part B if they have VA benefits? Generally, yes. Medicare and VA benefits don’t coordinate — each only pays for care within its own system — and VA coverage doesn’t exempt you from Medicare’s enrollment deadlines or penalties.

What is a Part B excess charge? An additional charge, up to 15% above the Medicare-approved amount, that a non-participating provider can legally bill you. It doesn’t count toward your deductible, and only Medigap Plan G (among current plans) covers it in full.

Can I keep contributing to my HSA if I enroll in Part B? No. Enrolling in any part of Medicare, including Part B, ends your HSA contribution eligibility going forward.

How long does it take to get approved for Part B? It depends on the enrollment window. Initial Enrollment Period applications typically process in 2–4 weeks. Special Enrollment Period applications, used when leaving employer coverage, generally take 4–8 weeks since Social Security must manually verify your prior coverage using Form CMS-L564. Start the process at least 2–3 months before you need coverage to begin, especially when coordinating around a job ending.

The Bottom Line

Part B is the half of Medicare that covers your everyday medical care — and it’s also where the real financial exposure of Original Medicare lives, thanks to that uncapped 20% coinsurance. Whether you should enroll at 65, whether you can safely delay, and how much of that exposure you’re carrying all depend on details specific to your situation: your employer’s size, your income, your VA status, and which doctors you actually see.

If you want help sorting out exactly how Part B applies to your specific circumstances — or want to understand how Medigap or Medicare Advantage could close that uncapped coinsurance gap — that’s exactly the conversation I have with clients every day, at no cost to you.

Call 631-358-5793 or visit paulbinsurance.com to set up a time to talk it through.

Paul Barrett, CMIP, is the founder of The Modern Medicare Agency, based in Melville, NY, and has spent 18+ years exclusively helping people navigate Medicare — never life insurance, never annuities, just Medicare. He’s licensed in 37 states, represents more than 40 carriers, and has personally helped over 5,000 clients choose coverage that actually fits their lives.

Figures current as of 2026 and sourced from CMS, Medicare.gov, and the Social Security Administration. Individual circumstances vary, especially around employer coverage, VA benefits, and income-based premiums — always verify your specific situation before making enrollment decisions.