Older patient confirms plan acceptance at clinic reception

Medicare Advantage Out of Network: What’s Covered and What You Pay

It depends on your plan type. Some Medicare Advantage plans, mainly PPOs, let you see out-of-network providers, but you usually pay a higher share of the cost. HMOs generally cover only in-network care. Every plan must cover emergency and urgently needed care, whoever provides it. Below, we explain how each plan type works, what a surprise bill can look like, what happens when you travel, and what to do before you book an appointment.

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Understand Your Medicare Plan Options
Paulbinsurance’s independent agents specialize in Medicare and help consumers understand their coverage options, including Medicare Advantage plans.

TL;DR

  • HMO plans generally require in-network care. PPO plans allow out-of-network care at a higher cost. PFFS plans work differently, with no network in many cases.
  • Emergency and urgently needed care is covered even from an out-of-network or out-of-area provider.
  • An out-of-network doctor does not have to treat you, and the plan’s terms decide what gets paid. Confirm before you schedule.
  • Routine care away from home often depends on your plan’s service area, so check before a long trip or a move.
  • If your doctor leaves the network, you can ask your plan about options, pick a new in-network provider, or review your plan choices during open enrollment.

Table of Contents

What “out of network” means on a Medicare Advantage plan

Original Medicare lets you see any provider in the country who accepts Medicare. Medicare Advantage (Part C) is different. A private insurer runs the plan under Medicare’s rules, and it builds a network of doctors, hospitals and other providers that have agreed to its payment terms. Those providers are “in network.” Everyone else is “out of network.”

The network matters because it drives three things: whether a visit is covered at all, how much you pay, and whether you need a referral or prior approval first. Medicare Advantage members must follow plan-specific rules, such as getting prior approval for certain services. Skipping a rule can turn a covered service into one you pay for yourself.

Networks also change. Doctors and hospitals join and leave, and a plan’s list can look different from one year to the next. Our guide to Medicare Advantage network restrictions goes deeper on how those limits work.

What "out of network" means on a Medicare Advantage plan

How out-of-network rules differ by plan type

The label on your plan card tells you more than any other detail. Medicare publishes how each type handles outside providers, and the differences are large.

Plan type Out-of-network care What to expect
HMO Generally not covered, except emergency care, out-of-area urgent care and temporary out-of-area dialysis Lowest flexibility, you stay in the network
HMO Point-of-Service (HMOPOS) Option to go out of network for certain services Usually costs more
PPO Allowed for covered services Higher out-of-pocket costs than in-network
PFFS Any Medicare-approved provider who accepts the plan’s terms and agrees to treat you Some PFFS plans also use networks
SNP (Special Needs Plan) Depends on the plan Some require in-network care, others cover qualified out-of-network providers at a higher cost

These summaries come from Medicare’s pages on comparing Medicare Advantage plan types, HMO point-of-service plans, PFFS plans and Special Needs Plans.

HMO plans

An HMO is the strictest design. Outside the network, you are generally on your own, with a short list of exceptions: emergencies, urgent care when you are out of the area, and temporary out-of-area dialysis. In exchange, HMOs often carry lower premiums and copays. If you have one doctor you will not give up, check that doctor first.

Some HMOs add a point-of-service option. That gives you a way to use out-of-network providers for certain services, usually at a higher cost to you.

HMO out-of-network coverage exceptions and costs

PPO plans

A PPO is the plan most people mean when they ask about out-of-network coverage. You can see providers outside the network for covered services, but you will typically pay more than you would in network. That can mean a higher copay or coinsurance, and sometimes a separate out-of-network deductible or out-of-pocket limit. The plan’s Summary of Benefits lists both sets of numbers side by side, so read both columns.

PFFS plans

Private Fee-for-Service plans are the odd ones out. You can go to any Medicare-approved provider who accepts the plan’s payment terms and agrees to treat you. The catch is in those last words. A provider is not obligated to say yes, and some PFFS plans also use specific networks. Availability of PFFS plans varies a lot by county, so many people will not see one on their list.

Special Needs Plans

SNPs serve people with certain conditions, dual eligibility for Medicare and Medicaid, or institutional needs. Some require in-network care. Others cover out-of-network care from qualified providers or facilities, usually at a higher cost. Read the plan’s own documents, because two SNPs in the same county can behave differently.

Emergencies and urgent care are always covered

This is the one rule that does not change by plan type. Medicare Advantage plans must cover emergency care and urgently needed services, even when the provider is out of network or out of the area. You do not need to ask permission first, and you should not delay care to check a directory.

Two practical points:

  1. Go to the nearest appropriate facility. If you believe your life or health is at serious risk, call 911 or go to the closest emergency room.
  2. Follow up with your plan afterward. Call the number on your member card to report the visit, and read any bill or explanation of benefits carefully. Your cost share for an emergency is set by your plan’s rules.

When a declared disaster or emergency disrupts care in your area, the protection widens. Your plan must allow care at Medicare-certified facilities from providers outside its network, without a referral, and at the in-network rate.

What out-of-network care can cost you

Medicare does not publish one out-of-network price, because each plan sets its own. What you can count on is the pattern: in-network visits cost the least, and out-of-network visits cost more when they are covered at all. A PPO might charge a flat copay for a specialist in network and a percentage of the bill out of network. The percentage version is the one that surprises people, because the final amount depends on what the provider charges.

A simple way to estimate your exposure before a visit:

  1. Open your plan’s Evidence of Coverage or Summary of Benefits.
  2. Find the out-of-network column for the service (specialist visit, outpatient surgery, imaging).
  3. Ask the provider’s billing office what they expect to charge and whether they will bill your plan.
  4. Call the plan with the provider’s name and the billing code, and ask how much you would owe.

If you skip step 3, you can end up in the situation brokers see often: the plan allows out-of-network care in principle, but the doctor declines to bill it and asks for payment up front.

Can an out-of-network provider refuse to treat you?

Yes, outside of emergencies. A provider who does not contract with your plan has no obligation to accept it, and out-of-network providers are not required to treat members except in emergencies, a point one regional PPO plan states on its own plan page. PFFS plans say the same thing in Medicare’s own wording: the provider must accept the plan’s terms and agree to treat you. So “my plan allows out-of-network” and “this doctor will see me under my plan” are two separate questions. Always ask the doctor’s office the second one.

Using Medicare Advantage out of state

Original Medicare works in all 50 states and U.S. territories, with no network. Medicare Advantage is tied to a service area, so what happens away from home depends on the plan. According to the National Council on Aging, some plans offer coverage across states and a national pharmacy network, while others do not cover care outside their service area, or apply higher cost sharing or prior authorization to out-of-network care. The same page notes that both Original Medicare and Medicare Advantage must cover emergencies.

In practice:

  • Emergency or urgent care while traveling: covered under every plan.
  • Routine care while traveling: PPOs are the more flexible option, but you still pay more out of network. HMOs generally do not cover routine care outside the service area.
  • Long stays away from home (snowbirds, extended family visits): ask your plan whether it offers a visitor or traveler benefit and how long it lasts. Some members find that a plan built for their home county does not fit a second home in another state.
  • Moving permanently: a move outside your plan’s service area usually opens a chance to change plans. Contact the plan and Medicare to confirm your options and timing.

If you split the year between two states, tell your agent before open enrollment, because it changes which plan type makes sense. Our overview of Medicare Advantage plans explains how service areas work.

Before you get out-of-network care: a checklist

Medicare’s own guidance is to check your plan’s provider directory or contact the plan to confirm a provider’s network status, and to ask how much you will pay out of network. Turn that into five steps:

  1. Confirm the network status. Look the provider up in the plan’s online directory, then call the plan, since directories can lag behind reality. Our guide on how to check if your specialist is in a Medicare Advantage network walks through it.
  2. Check the exact facility too. A doctor can be in network while the hospital or lab they use is not. Ask about both.
  3. Ask whether prior approval is needed. Many plans require authorization for surgeries, imaging and other services, and out-of-network care often has stricter rules.
  4. Get the cost in writing when you can. Ask the provider’s office for an estimate and your plan for the out-of-network cost share.
  5. Ask whether the provider will bill your plan. If not, find out what you must pay up front and whether you can file a claim yourself.

Do this again every fall. Medicare advises members to confirm that a provider is in the network before scheduling an appointment, especially around the annual enrollment period, October 15 to December 7, when networks and plan details for the next year are being finalized.

If your doctor leaves your plan’s network

This is the most common way people end up out of network without choosing it. When a provider leaves, your plan should make a good faith effort to give you at least 30 days’ notice. To get covered services at the in-network level, you will then need to choose a provider in the plan’s network.

Your options generally look like this:

  • Find an in-network replacement. Ask your doctor for referrals within the network.
  • Call the plan and ask what is available. Ask about continuing care if you are in the middle of treatment, such as chemotherapy or recovery from surgery. Plans have their own processes, and it is better to ask early.
  • Stay with the doctor and pay more. This is only realistic on a PPO or similar plan, and only if the doctor will bill the plan.
  • Review your plan at the next enrollment window. If the network no longer fits your life, you may want a plan that includes your doctor, or a different type of coverage entirely.

We cover this scenario in detail in what to do when your doctor leaves your Medicare network.

When the plan denies a service

Sometimes a plan refuses to cover a service or to authorize it in advance, which is common when someone goes out of network without approval. You have the right to appeal. The plan’s written decision, called a Notice of Denial of Medical Coverage, is the document you use to start an appeal. Keep it, note the deadline printed on it, and ask your doctor to support your case with a letter. Your State Health Insurance Assistance Program (SHIP) offers free, unbiased counseling on appeals.

Is a network-based plan right for you?

The out-of-network question is really a question about how much freedom you need. A few quick tests:

  • You have specialists you will not change, or you see providers in several states. Look hard at a PPO, or at Original Medicare paired with a Medicare Supplement (Medigap) plan. Medigap works with any provider who accepts Medicare, so it does not have a network. Compare options on our Medicare Supplement page.
  • Your doctors are all local and in network, and you want lower monthly costs. An HMO may fit, as long as you accept the network rules.
  • You travel often, or live in two places. Ask specifically about out-of-area benefits before you enroll.

Neither path is right for everyone. Medigap generally has higher premiums in exchange for broad access, while Medicare Advantage often has lower premiums in exchange for network rules. The best choice is the one that matches your doctors, your prescriptions and your budget.

Our perspective

We have heard the same story for years: someone picked a plan because the premium looked low, then found out in the middle of treatment that their specialist was not in the network. Nothing in the plan was hidden. Nobody had explained it to them in plain words.

That is why we start with education. Before we talk about any plan, we ask which doctors and hospitals you use, which prescriptions you take, and where you spend your year. Then we check those against the networks of the plans available in your county. As independent agents, we are not tied to one insurer, so we can show you an HMO, a PPO and a Medigap option side by side and tell you honestly what each one trades away. Plan networks can change from year to year, so we also recommend a yearly coverage checkup, not just a one-time purchase.

If your plan is working, we will tell you to keep it. If it is not, we will tell you that, too.

— Paul

Check your doctors against your plan

If you are choosing a plan, or you are unhappy with the one you have, our team can check your doctors, hospitals and prescriptions against the plans available where you live. There is no pressure and no cost to you for the review. Start with our Medicare Advantage plan page to see how we help, or ask us about Medigap if you want a plan without a network.

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For a closer look at how to confirm your doctor, read our guide on how to find doctors in your Medicare Advantage network.

FAQ

Does Medicare Advantage cover out-of-network care?

Some plans do, usually at a higher cost. PPOs and HMO point-of-service plans allow it, while standard HMOs generally do not, except for emergencies, out-of-area urgent care and temporary out-of-area dialysis. Check your plan’s Evidence of Coverage for the exact rules.

Can Medicare Advantage plans be used out of state?

It depends on the plan. Emergency and urgent care is covered anywhere, but routine care outside your service area may not be covered, or may cost more. Some plans offer broader coverage across states, so ask your plan before you travel for an extended time.

Will an out-of-network doctor see me?

Not necessarily. Outside of emergencies, a provider who does not contract with your plan can decline to treat you or to bill the plan. Call the doctor’s office and ask whether they accept your specific plan before you book.

What if my doctor leaves my plan’s network?

Your plan should make a good faith effort to give you at least 30 days’ notice. To get covered services at the in-network level, you will need to choose an in-network provider. Call the plan about continuing care if you are in active treatment.

Does Medigap have an out-of-network problem?

Medigap does not use a network. It works alongside Original Medicare, so you can see any provider who accepts Medicare. The tradeoff is usually a higher monthly premium than many Medicare Advantage plans.

Sources

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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