Does Medicare Cover Knee Replacement Surgery?

Knee replacement may be medically necessary, but hospital billing status sets your Medicare costs. Being admitted or sent home the same day can shift which part pays.

If surgery is being recommended for you or a parent, the first concern is simple: will Medicare help pay for it? We will start with Does Medicare Cover Knee Replacement Surgery?, then explain how the surgery setting changes your share of the bill. Here is how.

Does Medicare Cover Knee Replacement Surgery?

Short answer

Yes. Medicare covers knee replacement surgery when it is medically necessary and your doctor supports the need for treatment. Medicare states that it covers many medically necessary inpatient and outpatient surgical procedures.

That answer applies whether your surgeon plans a full knee replacement or recommends surgery after less invasive care no longer helps. A medically necessary hip replacement raises the same first question: has the doctor shown why surgery is needed?

Your medical record should show why the joint problem calls for surgery. The surgeon’s office can explain which notes and orders it will submit. This step helps prevent a surprise if a claim lacks the needed support.

Which part of Medicare pays?

With Original Medicare, the surgical setting matters. Part A generally handles an inpatient hospital admission. Part B generally handles an approved outpatient operation, including surgery in an outpatient hospital department or ambulatory surgical center.

Your admission status is not just a matter of spending the night in a hospital. Ask the surgeon and facility whether the procedure is planned as inpatient or outpatient. Our guide to Medicare Part A vs Part B coverage explains why that distinction affects billing.

Part B also covers doctor services and approved outpatient care tied to surgery. For an outpatient knee replacement, Original Medicare cost sharing may apply across the episode of care. Your exact bill depends on the facility, approved charges, deductibles, and whether your doctor accepts Medicare assignment.

Original Medicare or Medicare Advantage

Original Medicare follows Medicare’s coverage rules for medically necessary surgery. If you have a Medicare Advantage plan, the plan still provides Medicare-covered benefits. It may set its own network, referral, prior authorization, and cost-sharing rules.

Before scheduling knee or hip replacement, call your Medicare Advantage plan and the surgical office. Confirm these points in writing when possible:

• Whether your surgeon and facility are in the plan network.
• Whether the operation needs prior authorization before the surgery date.
• Whether the planned setting is inpatient or outpatient, and what costs apply.

If you have Original Medicare plus Medigap, the Medigap policy may help pay approved out-of-pocket costs. If you are comparing plan types before surgery, review Medigap coverage for surgery costs before you choose based on premiums alone.

The key is to verify medical necessity, surgical setting, and plan rules before the operation. Those checks do not replace your doctor’s advice. They can help you know which part of Medicare is expected to process each approved service.

How Part A and Part B Cover Knee and Hip Replacement

The setting decides which part pays

When a doctor recommends a medically necessary joint replacement, Medicare coverage starts with where the surgery takes place. An admitted hospital patient is inpatient. A patient released without admission is outpatient. This difference can apply to knee or hip replacement. It changes whether Part A or Part B processes the facility bill.

For a knee replacement, Medicare covers many medically necessary inpatient and outpatient surgical procedures. The final setting depends on the surgeon’s plan and the hospital’s admission decision. Before surgery, ask whether you will be admitted as an inpatient or treated as an outpatient. Medicare’s surgery coverage guidance explains why that status matters for costs.

Inpatient care under Part A

Part A helps cover inpatient hospital care when you are formally admitted for surgery. This usually includes the hospital stay tied to the operation. It does not mean every bill falls under Part A. Doctors’ professional services during a hospital stay are generally billed separately under Part B.

If you are admitted for a knee or hip replacement, review your Part A deductible before the procedure. Costs may also depend on the length of the hospital stay and later care needs. A clear view of Medicare Part A vs Part B coverage can help you sort facility and medical bills.

Outpatient care under Part B

Part B covers approved outpatient surgery in a hospital outpatient department or ambulatory surgical center. Outpatient knee replacement is now a covered option. An overnight recovery does not always mean inpatient admission. Confirm your status instead of judging it by time spent at the facility.

For a comprehensive outpatient service such as total knee replacement, you pay 20% for the episode of care. This applies after the Part B deductible. It may include related drugs and lab tests. The Medicare outpatient surgery page describes this cost-sharing rule.

Coverage setting	Medicare part	Typical cost exposure under Original Medicare
Inpatient hospital admission.	Part A for the hospital stay.	Part A deductible may apply.
Hospital outpatient department.	Part B.	Part B deductible, then coinsurance.
Ambulatory surgical center.	Part B.	Part B deductible, then coinsurance.
Follow-up physician visits.	Part B.	Part B cost sharing.

Before scheduling surgery, request the planned setting and an estimate of covered costs. Ask whether your surgeon accepts Medicare assignment and whether your plan has extra rules. If you have Medicare Advantage, check its network, approval, and cost-sharing terms before the procedure.

How Much Does Knee Replacement Cost With Medicare?

If you are asking whether Medicare covers knee replacement, cost is often the next concern. There is no single bill for every person. Your share depends on how the surgery is billed, where it is done, and whether other care is needed.

What changes your bill?

The key starting point is your patient status. A hospital admission is handled under Part A, while approved outpatient surgery is handled under Part B. Our guide to Medicare Part A vs Part B coverage explains that difference in plain terms.

Medicare says the amount you may owe depends on the provider’s charge and facility type. It also depends on the service location and whether your doctor accepts assignment. Review Medicare’s surgery coverage guidance as you plan your budget.

• Patient status: inpatient admission or outpatient care.
• Facility: a hospital or outpatient surgical setting.
• Provider: whether the doctor accepts Medicare assignment.
• Location: charges can differ where care is provided.

The surgeon’s office may use one setting more often than another. Still, ask about your planned procedure instead of relying on a general answer. The expected setting gives you a clearer way to check which Medicare cost rules apply.

Part A and Part B costs

If you are admitted as a hospital inpatient for knee replacement, check your Part A deductible. Ask the hospital or surgeon how your planned stay is expected to be billed. This question matters because inpatient and outpatient services are handled under different parts of Medicare.

If your knee replacement is an approved outpatient service, Part B cost rules apply. After you meet the Part B deductible, you pay 20% for a comprehensive outpatient knee replacement episode. Medicare says this episode can include drugs, lab tests, and other related services in its outpatient surgical services information.

Your surgeon, facility, and care team may each be involved in the claim process. Ask which providers will bill Medicare and whether each one accepts assignment. You can then compare the estimate with the claims information Medicare sends later.

How to prepare for an estimate

Before surgery, ask the surgeon’s office and facility for an estimate based on the planned setting. Be clear that you need to know if care is planned as inpatient or outpatient. Also ask whether your doctor accepts Medicare assignment.

• Confirm the planned facility and patient status.
• Ask which providers may submit bills for your care.
• Ask about services planned before and after surgery.
• Check whether you have met your deductible.

An estimate helps you plan, but later claims show what was billed and approved. Look at your latest Medicare Summary Notice or secure Medicare account for deductible information. After claims are processed, compare notices with provider bills.

If you have other coverage, ask how it applies after Medicare pays. A Medicare Supplement policy or a Medicare Advantage plan can change what you pay. Use your own plan details when you review the estimate.

Can Medigap Help Pay for Joint Replacement Costs?

If you have Original Medicare, joint replacement can leave bills beyond Medicare’s share. Medicare says a Medigap policy may help pay out-of-pocket surgery costs, such as deductibles and coinsurance. That help matters whether a doctor recommends a knee replacement or hip replacement.

When Medigap applies

Medigap works alongside Original Medicare for covered care. Medicare first processes an approved hospital stay, outpatient procedure, or doctor service. Your supplement then applies its benefits to eligible cost-sharing amounts under its plan rules. It does not change whether surgery is medically necessary or approved for Medicare coverage.

That is why the surgery setting is important. An inpatient admission can involve Part A cost sharing. An outpatient joint replacement can involve Part B cost sharing. Before surgery, ask whether your case is planned as inpatient or outpatient care. For a simple overview, review Medicare Part A vs Part B coverage.

How Plan G may reduce your share

For a Medicare-covered outpatient knee or hip replacement, you first meet the Part B deductible if it is still due. With Plan G, many covered Medicare-approved costs may be paid after that deductible is met. This can include Part B coinsurance that would otherwise remain your responsibility under Original Medicare.

Plan G does not mean every surgery bill becomes zero. You still pay the Part B deductible, and noncovered services can remain your responsibility. Your bill may also depend on the setting, provider, and related care. A written estimate is more helpful than relying on a general cost example.

Questions to ask before surgery

A knee or hip replacement often involves more than the operation itself. Tests, surgeon services, follow-up appointments, equipment, or therapy may appear on separate claims. Before scheduling care, confirm that your providers accept Medicare. Ask how each expected service will be billed.

• Is the planned replacement inpatient or outpatient?
• Has my Part B deductible been met for this year?
• Which bills are expected from the surgeon, facility, and recovery team?
• How will my Medigap Plan G benefits apply after Medicare processes each covered claim?

If you are comparing coverage before joint replacement, start with Medigap coverage for surgery costs. A plan review can clarify how Original Medicare and your supplement work together. It can also help you prepare questions before care begins, without promising an exact final bill.

What Should Medicare Advantage Members Check Before Surgery?

Plan approval before the procedure

If you are asking whether Medicare covers knee replacement, your Medicare Advantage plan is the first place to verify details. Medicare covers many medically necessary surgeries, but members of a Medicare health plan should contact their plan for more information. Medicare explains this point in its surgery coverage guidance.

Original Medicare and Medicare Advantage do not always handle surgery in the same way. An Advantage plan may set its own prior authorization rules and out-of-pocket cost structure for knee replacement. Our guide to Medicare Advantage prior authorization rules can help you frame the right questions for your plan.

Ask whether your surgeon must send records, imaging results, or a request for plan approval. Also ask when the approval expires and whether a change in facility needs a new request. A surgeon’s recommendation and a plan’s approval are two separate items to confirm before surgery.

Network checks for the full care team

Before surgery, ask the plan to check each provider tied to your care. Start with your surgeon and hospital or surgery center. Then check anesthesia, imaging, physical therapy, home health, and any rehab facility discussed for recovery.

Do not assume that one in-network provider makes the full episode in network. Call the member services number on your plan card, or use its provider directory. Ask the office to confirm its network status with your exact plan name as well.

• Confirm the surgeon, assistant surgeon, and anesthesia group.
• Confirm the hospital or outpatient surgery center shown on the order.
• Confirm physical therapy, home health, or skilled nursing options for recovery.
• Save names, dates, reference numbers, and any written approvals.

Recovery plans can shift after an operation. If your care team discusses skilled nursing care, ask the plan what rules apply before choosing a facility. Medicare describes skilled nursing facility coverage after a qualifying hospital stay of at least three days.

Costs to confirm in advance

Coverage does not tell you the exact amount you may owe. Your plan can explain its deductible, copay, coinsurance, and maximum out-of-pocket rules for surgery and follow-up care. Ask for an estimate that separates the facility, surgeon, therapy, and rehab costs.

Also ask whether the cost changes if surgery is done as an inpatient admission or as an outpatient service. That distinction can affect billing and your cost share. Review each planned setting with your plan before choosing a surgery date.

Bring a short checklist to each call: approval status, network status, setting, estimated cost, and recovery providers. Request answers before the procedure is scheduled. Clear records can make follow-up easier if the plan or provider later gives different information.

Does Medicare Cover Rehab After Knee or Hip Replacement?

Recovery after a knee or hip replacement often includes therapy, safety checks, and help with daily tasks. Medicare may cover parts of that care when it is medically necessary and Medicare rules are met. The setting matters: care at home, in a clinic, or in a skilled nursing facility can create different bills.

Rehab services after joint surgery

Many patients need exercises to rebuild strength and improve safe movement after surgery. Your doctor may order physical therapy in an outpatient clinic or in another approved setting. Medicare lists home health services as a possible recovery option when its coverage requirements are met.

A safe plan depends on your movement, wound care needs, home support, and doctor’s orders. Some people go home with therapy, while others need short-term skilled care. For a closer look at therapy benefits and bills, read this guide to physical therapy after knee replacement.

Skilled nursing facility rules and costs

Some people need daily skilled nursing or therapy before they can return home safely. Under Original Medicare, Part A can cover eligible skilled nursing facility care after a qualifying inpatient hospital stay of at least three days. An outpatient stay or observation time may not meet that inpatient stay rule.

This is why discharge planning starts before you leave the hospital. Ask whether your surgery admission is inpatient or outpatient, and ask what rehab setting the care team expects. A stay that qualifies for one type of care may still leave deductibles, copays, or coinsurance for you to pay.

Steps to take before discharge

You do not need to guess about the next stage of recovery. Ask these questions while your surgeon, case manager, and plan information are still easy to reach.

1. Confirm your hospital status. Ask whether you were admitted as an inpatient or treated as an outpatient. Request the answer in writing for your records.

2. Get the rehab order. Ask the doctor what therapy or skilled care is medically needed. Find out where it will occur and how soon it should begin.

3. Check skilled nursing eligibility. If a facility stay is recommended, ask whether the qualifying inpatient stay rule has been met. Also confirm that the facility accepts Medicare.

4. Ask about a home option. If returning home is safe, ask whether home health therapy may fit your needs. Confirm who will arrange visits and needed equipment.

5. Review plan costs and approvals. Call your plan before discharge if possible. Ask about network providers, needed approvals, deductibles, copays, and coinsurance for the planned setting.

Keep the discharge plan, hospital status notice, therapy order, and plan answers together. If your care setting changes during recovery, check coverage again before services begin. These steps can help you compare the care you need with the costs you may face.

Questions to Ask Before Your Joint Replacement

Preparing for joint replacement can feel more manageable when you have clear answers in writing. If you are asking, “does Medicare cover knee replacement,” start with what is documented and where care will occur. Then ask how each provider will bill.

Questions for your surgeon and hospital

Medicare covers many medically necessary inpatient and outpatient surgical procedures, according to Medicare’s surgery coverage guidance. Ask your surgeon what records support the need for surgery. Also ask whether you will be admitted as an inpatient or treated as an outpatient.

1. Confirm medical necessity. Ask, “What diagnosis, exam results, imaging, and treatment history will support the request for joint replacement?” Request a copy of the care plan for your records.
2. Confirm your hospital status. Ask, “Do you expect inpatient admission or outpatient surgery?” Then ask who will tell you if that status changes before discharge.
3. Verify participating providers. Ask the surgeon, anesthesiologist, hospital, and rehab provider whether each accepts Medicare assignment. If you have Medicare Advantage, ask the plan whether each provider and facility is in network.
4. Check approval rules. Ask your plan, “Is prior authorization required for the surgery, hospital, implant, or rehabilitation?” If yes, ask who submits it and how you can confirm approval.
5. Plan your recovery care. Ask whether you may need home therapy, outpatient therapy, or skilled nursing care. Confirm the expected start date and which providers can provide that care under your coverage.
6. Request cost estimates. Ask the hospital and plan for your expected deductible, copayment, and coinsurance. Include surgeon, anesthesia, facility, follow-up visits, equipment, and rehabilitation in your questions.

Questions about Parts A and B

Hospital status matters because it guides which coverage questions you need to ask. Review Medicare Part A vs Part B coverage before you call your plan. Bring your admission-status question to both the hospital and your coverage adviser.

For approved outpatient surgery, Part B cost-sharing may include the deductible and coinsurance. Medicare explains that outpatient total knee replacements can be comprehensive services, with 20% coinsurance for the care episode after the deductible. See the outpatient surgery cost-sharing rules before requesting your estimate.

Questions for your plan and broker

A broker can help you organize questions, but your surgeon and plan confirm the coverage details. Ask for written answers about authorization, network use, assignment, rehab choices, and expected out-of-pocket costs. Keep those answers with your surgery paperwork, so billing questions are easier to address later.

Frequently Asked Questions

How much does knee replacement cost with Medicare?

With Original Medicare, your cost depends on where surgery occurs and which approved services you receive. For an outpatient knee replacement, Medicare says you generally pay 20% of the Medicare-approved amount after meeting the Part B deductible. For an inpatient surgery, the Part A deductible and any applicable hospital coinsurance may apply. Ask the facility whether you will be admitted or treated as an outpatient.

Does Medicare cover outpatient knee replacement?

Yes. Medicare Part B can cover approved outpatient knee replacement surgery when it is medically necessary. Outpatient care may take place in a hospital outpatient department or an ambulatory surgical center. The Medicare outpatient coverage page explains that the patient’s share usually includes Part B cost sharing. Confirm the facility status before surgery because outpatient billing differs from an inpatient admission.

Does Medicare cover rehabilitation after knee replacement?

Medicare may cover recovery care after a medically necessary knee replacement, but each service has its own rules. Part A can cover skilled nursing facility care after a qualifying inpatient hospital stay of at least three days, as described by Medicare. An outpatient procedure does not by itself meet that inpatient-stay requirement. Physical therapy coverage may be separate under Part B.

Does Medicare Advantage require prior authorization for knee replacement?

A Medicare Advantage plan may require prior authorization before a knee or hip replacement, and network or cost-sharing rules may apply. Medicare directs people enrolled in a Medicare health plan to contact their plan for surgery coverage details on its surgery coverage page. Before scheduling surgery, ask the plan and surgeon whether authorization is needed and whether the facility is in network.

Can Medigap help pay knee replacement costs?

Yes, depending on the policy and the Medicare-approved services involved. Medigap works with Original Medicare and can help pay covered out-of-pocket costs, such as certain deductibles and coinsurance. It does not replace Medicare’s medical necessity and coverage rules. The Medicare surgery coverage page advises checking your Medigap policy for cost-sharing help before a planned surgery.

Get Personalized Medicare Guidance Before Surgery

If you are planning a knee or hip replacement, the biggest Medicare question is not only whether the surgery is covered. It is how your specific plan will handle the hospital, surgeon, rehab, and follow-up bills. The Big 65 helps you sort through those details without pressure or confusion.

Contact a Medicare insurance broker for a personalized coverage review before your procedure.