Senior woman reviewing Medicare deductible paperwork

Medicare Deductible Explained: Your 2026 Cost Guide

A Medicare deductible is the amount you pay out of pocket before Medicare begins covering your healthcare costs. For new enrollees turning 65 or leaving employer coverage, understanding this upfront cost is the difference between a manageable budget and a financial surprise. Medicare Parts A, B, and D each carry their own deductible structure, and the 2026 amounts have shifted from prior years. This guide breaks down every deductible, what triggers it, and what you pay after it is met.

What is the Medicare deductible, and why does it matter in 2026?

A Medicare deductible is not a single annual number. It varies by plan part, resets on different schedules, and can apply more than once in a year depending on your health. Most people transitioning from employer coverage expect one annual deductible like they had at work. Medicare works differently, and that difference catches new enrollees off guard every year.

The Centers for Medicare and Medicaid Services (CMS) sets deductible amounts annually. For 2026, the three main deductibles are $1,736 for Part A, $283 for Part B, and up to $615 for Part D. Each one applies under different conditions, which is why understanding Medicare costs as a whole matters more than memorizing a single figure.

Patient discussing Medicare deductible bills with hospital clerk

Deductibles are just one layer of what you pay. Premiums, coinsurance, copays, and income-based surcharges all stack on top. Knowing how each piece fits together lets you plan your retirement healthcare budget with accuracy instead of guesswork.

How does the Medicare Part A deductible work?

The Part A deductible is $1,736 per benefit period in 2026, not per calendar year. That distinction matters enormously. A benefit period begins the day you are admitted as a hospital inpatient and ends after you have been out of inpatient care for 60 consecutive days.

The 60-day rule is the part most new enrollees miss. Readmission within 60 days does not trigger a new deductible. But if you are discharged, recover at home for 61 days, and then return to the hospital, you owe the full $1,736 again. Two separate hospital stays in one calendar year can cost you $3,472 in Part A deductibles alone.

After you meet the deductible, coinsurance kicks in based on how long you stay:

  • Days 1–60: $0 coinsurance. The deductible covers this window.
  • Days 61–90: $434 per day in coinsurance.
  • Days 91–150: $868 per day (lifetime reserve days).
  • Beyond 150 days: Medicare pays nothing. All costs fall to you.
Hospital Stay Length Your Cost Per Day
Days 1–60 $0 (after $1,736 deductible)
Days 61–90 $434
Days 91–150 $868
Beyond 150 days 100% of costs

Pro Tip: Ask your hospital whether you are admitted as an inpatient or placed under “observation status.” Observation status is outpatient care, which means your stay does not count toward a benefit period and your costs fall under Part B instead.

Infographic showing 2026 Medicare deductible amounts and reset timing

What is the Medicare Part B deductible, and how does it affect outpatient costs?

The Part B annual deductible is $283 in 2026, and it resets every january 1. Unlike Part A, you only pay it once per calendar year regardless of how many doctor visits or outpatient procedures you have. After you meet it, Medicare pays 80% of approved costs and you pay the remaining 20%.

That 20% coinsurance has no annual cap under Original Medicare. A $50,000 outpatient surgery leaves you with a $10,000 bill after the deductible. This is the structural gap that makes supplemental coverage worth examining for most new enrollees.

Common Part B services subject to the deductible and coinsurance include:

  • Doctor office visits and specialist consultations
  • Outpatient surgery and procedures
  • Lab tests, X-rays, and imaging
  • Durable medical equipment like wheelchairs or walkers
  • Outpatient mental health services

Pro Tip: Preventive services like the annual wellness visit, flu shots, and many cancer screenings are covered at 100% under Part B with no deductible required. Schedule these early in the year to get full value from your coverage.

One detail worth knowing: if your doctor does not accept Medicare assignment, they can charge up to 15% above the Medicare-approved amount. That excess charge is not covered by Medicare and adds to your out-of-pocket total.

Understanding Medicare Part D deductibles and prescription drug costs

Part D covers prescription drugs, and its deductible structure is more flexible than Parts A or B. The maximum Part D deductible is $615 in 2026, but individual plans set their own amounts up to that ceiling. Many plans charge less, and some waive the deductible entirely for lower-tier generic drugs.

The biggest change in recent years is the out-of-pocket cap. Under the Inflation Reduction Act, Part D spending is capped at $2,100 once you reach that threshold in covered drug costs. After that point, you pay $0 for covered prescriptions for the rest of the calendar year. That cap is a significant protection for people on high-cost medications.

Part D coverage moves through phases during the year:

  • Deductible phase: You pay 100% of drug costs until you meet your plan’s deductible.
  • Initial coverage phase: You pay copays or coinsurance; your plan pays the rest.
  • Catastrophic phase: Once out-of-pocket costs hit $2,100, you pay nothing for covered drugs.
Part D Phase What You Pay
Deductible phase 100% of drug costs (up to $615 max)
Initial coverage phase Copays or coinsurance per drug tier
Catastrophic phase $0 for covered drugs

Pro Tip: Compare plan formularies, not just premiums. A plan with a $0 deductible but high coinsurance on your specific drugs can cost more annually than a plan with a $400 deductible and low copays. Use the Medicare Plan Finder tool at Medicare.gov to run the numbers on your actual prescriptions.

For a deeper look at Part D coverage phases and how the old donut hole was replaced, Paulbinsurance has a dedicated guide covering the full 2026 structure.

How do Medicare Advantage and Medigap plans interact with deductibles?

Original Medicare and Medicare Advantage handle deductibles and cost sharing very differently. Medicare Advantage plans cap in-network out-of-pocket costs at $9,250 in 2026. That ceiling protects you from catastrophic costs in a way that Original Medicare does not.

Original Medicare carries no annual out-of-pocket maximum for Parts A and B combined. That means a serious illness or extended hospital stay can generate unlimited cost sharing. This structural gap is why most financial planners recommend some form of supplemental coverage for people on Original Medicare.

Two main options exist for filling that gap:

  • Medicare Advantage (Part C): Replaces Original Medicare with a private plan. Includes an out-of-pocket maximum, often adds dental, vision, and hearing benefits, but restricts you to a network of providers.
  • Medigap (Medicare Supplement): Works alongside Original Medicare. Medigap plans are lettered A through N with varying coverage levels. Higher-tier plans like Plan G cover the Part A deductible, Part B coinsurance, and excess charges.

The trade-off is real. Medicare Advantage plans often carry $0 premiums but require referrals, prior authorizations, and network restrictions. Medigap plans charge monthly premiums but give you access to any provider that accepts Medicare nationwide. For people who travel frequently or want to see specialists without referrals, Medigap often wins on flexibility.

For help deciding between these two paths, Paulbinsurance offers a direct comparison at Medicare Advantage vs. Supplements.

What other costs should new Medicare enrollees plan for?

Deductibles are one piece of a larger cost picture. New enrollees frequently miss all four cost categories: premiums, deductibles, coinsurance and copays, and IRMAA surcharges. Missing any one of them leads to budget shortfalls in the first year.

IRMAA (Income-Related Monthly Adjustment Amount) is the surcharge that higher-income beneficiaries pay on top of standard Part B and Part D premiums. IRMAA thresholds for 2026 are $106,000 for single filers and $212,000 for joint filers, based on your income from two years prior. If your 2024 income exceeded those levels, you will pay more for Medicare in 2026 regardless of your current income.

The standard Part B premium in 2026 is $185 per month. IRMAA surcharges can push that figure significantly higher depending on your income bracket. Part D premiums vary by plan, but IRMAA adds a separate surcharge on top of whatever your plan charges.

Key cost categories to budget for:

  • Premiums: Monthly payments for Parts B and D, plus any Medigap or Advantage plan premium.
  • Deductibles: Part A per benefit period, Part B annually, Part D annually.
  • Coinsurance and copays: The percentage or flat fee you pay after deductibles are met.
  • IRMAA surcharges: Income-based additions to Part B and Part D premiums.

Pro Tip: If your income dropped due to retirement, marriage, divorce, or another qualifying life event, you can appeal your IRMAA surcharge using Form SSA-44. CMS will recalculate based on your current income rather than the two-year-old figure.

For a full breakdown of lowering out-of-pocket Medicare costs, Paulbinsurance covers practical strategies that go beyond just picking the right plan.

Key Takeaways

Medicare deductibles vary by part, reset on different schedules, and stack with premiums, coinsurance, and IRMAA surcharges to form your true annual Medicare cost.

Point Details
Part A deductible resets per benefit period You can owe $1,736 more than once per year if readmitted after 60 days.
Part B deductible resets annually The $283 deductible applies once per calendar year, then 20% coinsurance continues with no cap.
Part D has a $2,100 out-of-pocket cap Once you hit that threshold, covered drugs cost $0 for the rest of the year.
Original Medicare has no out-of-pocket maximum Without supplemental coverage, your cost exposure is unlimited under Parts A and B.
IRMAA affects higher-income enrollees Single filers earning over $106,000 in 2024 will pay surcharges on 2026 Part B and Part D premiums.

What I’ve learned after nearly two decades helping Medicare enrollees

I have been working with Medicare beneficiaries since 2007, and the single most common mistake I see is treating Medicare like employer coverage. People assume one deductible, one reset date, one maximum. Medicare does not work that way, and the cost of that assumption can be thousands of dollars.

The benefit period concept for Part A is the biggest blind spot. I have spoken with people who had two hospitalizations in one year and were genuinely shocked to owe two full deductibles. Nobody told them that 60 days without inpatient care resets the clock.

The second thing I tell every new enrollee: review your plan every October during Open Enrollment. Plan formularies change, premiums shift, and the plan that worked perfectly this year may cost you significantly more next year. Staying enrolled in the same plan by default is one of the most expensive habits in Medicare.

Finally, do not wait until you have a health event to understand your coverage. The people who navigate Medicare well are the ones who learned the rules before they needed them. That is exactly why education comes first at Paulbinsurance.

— Paul

Managing your Medicare deductibles with the right supplement plan

Knowing your deductibles is the first step. Covering them is the second.

https://paulbinsurance.com

Medicare Supplement plans, also called Medigap, are designed to pick up the costs that Original Medicare leaves behind. Depending on the plan letter you choose, Medigap can cover your Part A deductible, your Part B coinsurance, and even excess charges from doctors who do not accept Medicare assignment. That coverage pairs with any provider who accepts Medicare, giving you nationwide access without network restrictions. At Paulbinsurance, our independent agents help you compare Medicare Supplement options side by side so you can choose the coverage that fits your health needs and budget. Paul Barrett and the team have been doing this since 2007, and the consultation costs you nothing.

FAQ

What is a Medicare deductible?

A Medicare deductible is the amount you pay for covered services before Medicare begins paying its share. Each part of Medicare, Parts A, B, and D, has its own separate deductible.

How does the Part A deductible differ from Part B?

The Part A deductible is $1,736 per benefit period and can apply more than once per year. The Part B deductible is $283 per calendar year and resets every january 1.

Can I have more than one Part A deductible in a single year?

Yes. If you are discharged from inpatient care and remain out of the hospital for 60 consecutive days, a new benefit period begins and the $1,736 deductible applies again.

Does Medicare Advantage eliminate these deductibles?

Medicare Advantage plans set their own deductible and cost-sharing structures, and they cap your in-network out-of-pocket costs at $9,250 in 2026. Original Medicare has no such cap.

What is the Part D out-of-pocket maximum in 2026?

The Part D out-of-pocket cap is $2,100 in 2026 under the Inflation Reduction Act. Once you reach that amount in covered drug spending, you pay $0 for covered prescriptions for the rest of the year.

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.

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