Chiropractic Medicare Coverage: What Is Covered, What’s Not, and How to File

If you want to know whether Medicare helps pay for chiropractic care, the short answer is: Medicare Part B covers spinal manipulation only when a doctor or chiropractor finds a vertebral subluxation that is medically necessary.

You can get some coverage for spinal adjustments, but most other chiropractic therapies usually aren’t paid for by Original Medicare.

You’ll learn what counts as eligible care, what Medicare won’t cover, and how to actually get services approved and billed.

The Modern Medicare Agency connects you with licensed agents who talk with you one-on-one, find Medicare plans that match your needs, and explain costs without hidden fees.

Keep reading to see which services qualify, how claims work, what Medicare Advantage plans may add, and where to find up-to-date rules and help from experts.

Eligibility Criteria for Chiropractic Medicare Coverage

Medicare covers chiropractic services only when specific medical rules are met.

You need to meet Part B rules, provide the right documentation, and be in one of the beneficiary groups that Medicare recognizes.

Medicare Part B Requirements

Medicare Part B covers manual manipulation of the spine to correct a subluxation that a doctor documents.

You must have a neuromusculoskeletal condition that a licensed chiropractor or other physician finds requires treatment.

Medicare will not cover X-rays, massage, or other services as part of chiropractic care unless those services are medically necessary and billed under a covered benefit.

You must receive services from a practitioner who accepts Medicare assignment or from a provider in a Medicare-approved setting.

Part B may require you to meet deductible and coinsurance rules, so expect to pay 20% of the Medicare-approved amount after the Part B deductible is met.

If you have Medicare Advantage, coverage rules and out-of-pocket costs can differ from Original Medicare.

Documentation Needed for Coverage

Your chiropractor or treating physician must document the subluxation and the medical necessity of manipulation in your medical record.

Records should include a clear diagnosis, the clinical findings that support subluxation, treatment plans, and progress notes showing improvement or continuing need.

Without these notes, Medicare may deny payment.

Keep copies of all visit notes, referrals, and test results.

If you submit claims or appeal denials, well-organized records make the process faster.

The Modern Medicare Agency can help you understand what documentation your plan requires and assist with questions when a claim looks at risk of denial.

Types of Beneficiaries Covered

Original Medicare Part B covers eligible beneficiaries who are enrolled in Part B and meet medical necessity rules.

Beneficiaries in Medicare Advantage (Part C) may also get chiropractic coverage, but benefits, copays, and limits can vary by plan.

You must check your specific plan for limits on visits and any prior authorization rules.

If you have supplemental Medigap coverage, it may help pay some Part B coinsurance for covered chiropractic services.

Active-duty veterans or those in special programs should verify primary coverage rules, as Medicare coordination of benefits can change who pays first.

The Modern Medicare Agency’s licensed agents can review your situation and match you with Medicare plans that fit your chiropractic care needs without extra fees.

Covered Chiropractic Services Under Medicare

Medicare covers certain spine-related services when they meet medical rules.

You should know exactly which spinal manipulation is covered, what counts as medically necessary, and how often Medicare will pay.

Spinal Manipulation Benefits

Medicare Part B covers manual manipulation of the spine when a licensed chiropractor or other qualified provider treats a subluxation (a partial dislocation or misalignment shown in the medical record).

This means you can get hands-on adjustment only when the provider documents that the spinal alignment issue is present and causing symptoms or loss of function.

Covered spinal manipulation includes the actual manual adjustment itself.

Medicare will pay for the manipulative treatment visit, but not for X-rays, massage, or other non-manual therapies unless those services meet separate Medicare rules.

You must get care from a provider who accepts Medicare, or you may face higher out-of-pocket costs.

Medically Necessary Treatments

Medicare pays only for services it calls “medically necessary.”

That means the treatment must diagnose or treat a medical condition and be reasonable and customary for that condition.

Your chiropractor must document the diagnosis, symptoms, and why the chosen treatment is needed.

Services like soft-tissue therapy, acupuncture, or ongoing maintenance care generally won’t be covered unless the chart shows active, worsening symptoms and measurable benefit.

If you use a Medicare Advantage plan, check your plan’s rules—some plans may cover extra services beyond Original Medicare.

Frequency and Duration of Coverage

Medicare does not set a fixed number of covered chiropractic visits per year.

Coverage depends on medical need shown in your records.

Each visit must include documentation that the manipulative treatment remains necessary and is helping your condition.

Expect audits or reviews when treatment is frequent or long-term.

If Medicare agrees the treatment is effective, it may continue paying.

Always keep clear records, get prior authorizations if required by your plan, and verify provider billing to avoid surprise charges.

Limitations and Exclusions of Medicare Coverage

Medicare covers only specific spinal manipulations and leaves many chiropractic services unpaid.

You may face denials for therapies, tests, or ongoing care that Medicare calls non-covered, and you will likely pay deductibles and coinsurance for covered visits.

Non-Covered Chiropractic Services

Medicare limits coverage to manual manipulation of the spine to correct a diagnosed subluxation.

Anything beyond that — such as X-rays ordered by a chiropractor, massage, acupuncture, nutritional counseling, or rehabilitative exercises provided by the chiropractor — is generally not covered.

Tests or treatments that Medicare deems not medically necessary will be denied.

If a chiropractor orders services that Medicare doesn’t cover, you become responsible for the full bill unless you signed an Advance Beneficiary Notice (ABN) before treatment.

Keep clear records: diagnoses, treatment notes, and specific manipulations help if you need to appeal a denial.

Out-of-Pocket Costs and Deductibles

Original Medicare Part B pays 80% of approved chiropractic manipulation costs after you meet the Part B deductible.

You pay the remaining 20% coinsurance and any charges for non-covered services in full.

Part A does not cover outpatient chiropractic care.

If you have a Medicare Advantage plancost-sharing can differ.

Some plans offer additional coverage but may require copays, prior authorization, or network restrictions.

Speaking with an agent from The Modern Medicare Agency helps you compare plans and estimate your likely out-of-pocket costs.

How to Access Chiropractic Care with Medicare

You can find a Medicare-approved chiropractor and learn what paperwork or referrals you need.

Know how to check a provider’s Medicare status and when you must get a doctor’s sign-off.

Finding Medicare-Approved Chiropractors

Check the Medicare Physician Compare tool or call Medicare at 1-800-MEDICARE to confirm a chiropractor accepts Original Medicare (Part B).

Ask the chiropractor if they bill Medicare directly and whether they accept Medicare assignment.

If they do not accept assignment, you may pay more out of pocket.

If you have a Medicare Advantage plan, call your plan or check its provider directory to see in-network chiropractors.

Ask about copays, prior authorization, and visit limits.

Keep a written estimate of costs before treatment.

The Modern Medicare Agency can help you find in-network chiropractors and explain costs for your plan.

Referral and Prescription Policies

Original Medicare (Part B) covers spinal manipulation only for treating a neuromusculoskeletal condition.

You do not usually need a referral to see a chiropractor, but Medicare requires that the treatment be medically necessary and related to a diagnosed condition.

Some Medicare Advantage plans may require a referral or prior authorization for chiropractic services.

Your primary care doctor may need to document the condition and recommend treatment to satisfy plan rules.

Keep copies of notes, orders, and any prior authorization letters in case Medicare or your plan requests proof.

Contact The Modern Medicare Agency if you need help understanding referral needs or getting documentation organized.

Billing and Claims Process for Chiropractic Services

You will need to document services clearly, use the right codes, and follow Medicare submission rules to get paid.

Accurate records and timely claims reduce denials and speed payment.

Submitting Claims to Medicare

When you bill Medicare for chiropractic spinal manipulation, use CPT code 98940–98942 for manipulation by hand.

Submit claims with the correct ICD-10 diagnosis that shows a subluxation or related spinal condition.

Include the date of service, place of service, and provider’s NPI on each claim.

Medicare limits coverage to manual manipulation of the spine.

If you bill for modalities, x-rays, or evaluations, check whether Medicare covers those services before submitting.

Use electronic claims (837P) when possible; they process faster than paper.

Follow timely filing rules—typically within one year of the date of service—unless a local contractor specifies otherwise.

Keep copies of documentation for at least five years in case of audit.

If a claim denies, review the denial reason, correct errors, and resubmit with supportive documentation.

Understanding Explanation of Benefits

Your patient will receive an Explanation of Benefits (EOB) that lists billed services, allowed amounts, Medicare payments, and patient responsibility.

Read the EOB line by line to confirm services, dates, and amounts match your records.

If the EOB shows a denial or reduced payment, note the denial code and reason.

Common reasons include lack of documented subluxation, incorrect coding, or services outside Medicare’s coverage.

Use the appeals process if you have supporting documentation; include progress notes, treatment plans, and imaging if relevant.

The Modern Medicare Agency can help you and your patients review EOBs and file appeals.

Medicare Advantage and Chiropractic Benefits

Medicare Advantage plans can change how much you pay, where you get care, and what chiropractic services you can use.

You may get broader benefits or face network rules and copays that differ from Original Medicare.

Differences from Original Medicare

Medicare Advantage (Part C) must cover at least the same chiropractic service Original Medicare covers: spinal manipulation for treating vertebral subluxation. But Advantage plans often add limits and requirements you should know.

Many plans use provider networks. If you see an out-of-network chiropractor, you may pay more or get no coverage.

Plans set copays, coinsurance, and plan-year limits that vary by plan and county. Prior authorization may be required for certain services or multiple visits.

Deductibles can apply before benefits start. Check each plan’s Evidence of Coverage for exact rules on visits, billing codes, and referral needs.

Additional Coverage Options

Some Medicare Advantage plans include extra chiropractic or musculoskeletal benefits beyond spinal manipulation. These extras can cover routine chiropractic visits, acupuncture, physical therapy, or wellness services.

Benefit amounts differ by plan. You might see a set number of covered visits per year, a dollar cap, or a reduced copay for in-network providers.

Plans may bundle these services in supplemental wellness packages or as part of a chronic condition program. Not every plan in every area offers these extras, so availability depends on your ZIP code.

Recent Changes and Updates to Chiropractic Medicare Policies

Congress has moved to expand Medicare’s coverage of chiropractic services. New bipartisan legislation seeks to let chiropractors bill Medicare for all services allowed under their state license, not just spinal manipulation.

This change would align Medicare with other federal programs and many private plans. You may gain access to therapies like joint mobilization and soft-tissue techniques through a chiropractor without switching providers.

If the bill passes, Medicare would still limit coverage to services that are medically necessary. Reimbursement rules would change only for which providers can be paid, not for adding entirely new services to the program.

Key points at a glance:

Contact The Modern Medicare Agency to talk to a licensed agent and learn how these policy changes might affect your plan options.

Resources for Further Information

For clear, personalized help with chiropractic coverage under Medicare, contact The Modern Medicare Agency. You can speak one-on-one with a licensed agent who listens to your needs and explains options in plain language.

They help you find plans that fit your budget without hidden fees. Use official Medicare documents and the Medicare website to check rules about spinal manipulation and subluxation.

Bring questions to your agent so they can compare how Original Medicare and Medicare Advantage plans handle chiropractic services for you. Keep a list of questions before you call: What does my plan cover?

Are X-rays or other tests included? How much will I pay for each visit?

Your agent at The Modern Medicare Agency will walk through answers and show plan details side-by-side. If you prefer written guides, ask The Modern Medicare Agency for printed materials or email summaries.

Their agents provide straightforward comparisons, enrollment deadlines, and step-by-step help with claims or appeals if you need it. You can also request a free consultation to review your current plan and potential savings.

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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