Medicare Part B covers prosthetic legs, but only if your doctor prescribes them as medically necessary and you meet specific requirements

Medicare Part B will pay for a prosthetic leg (also called a prosthesis or artificial limb) if a doctor determines it is medically necessary for you to walk or move. The program covers the device itself, the fitting, and adjustments. However, Medicare does not cover all prosthetics equally — the amount you pay depends on whether your prosthetist is enrolled with Medicare, how often you need replacements, and whether your device includes advanced features.

The key requirement is that you must have lost your leg or have a permanent condition that makes your natural leg unusable. Medicare will not cover a prosthetic for temporary injuries or conditions that may improve. You also need a written order from your doctor stating that the prosthetic is medically necessary.

Key Takeaways

  • Your doctor must write a prescription stating the prosthetic leg is medically necessary before Medicare will consider paying for it.
  • Medicare Part B typically covers 80 percent of the approved cost after you meet your yearly deductible, and you pay the remaining 20 percent.
  • You must use a prosthetist who is enrolled with Medicare; using an out-of-network provider means you pay the full cost yourself.
  • Medicare covers one prosthetic leg every five years under standard rules, though faster replacement may be covered if your condition changes or the device fails.
  • Advanced features like microprocessor knees or specialized materials may cost more than Medicare's approved amount, and you would pay the difference.

How much Medicare pays and what you owe

After you meet your Part B deductible (which changes yearly), Medicare pays 80 percent of the approved cost for a prosthetic leg. You pay the remaining 20 percent. The approved cost is set by Medicare and varies by the type of prosthetic and the components used.

If your prosthetist is enrolled with Medicare, they must accept the approved amount as payment in full for the parts and fitting covered by the program. If you choose a prosthetist who does not accept Medicare assignment, you may owe the full difference between what they charge and what Medicare approves. Before you schedule a fitting, ask the prosthetist whether they accept Medicare assignment.

If you have a Medigap or Medicare Advantage plan, your out-of-pocket costs may be lower. Medigap plans can cover some or all of the 20 percent you would normally pay. Medicare Advantage plans have their own rules about prosthetics, so contact your plan directly to learn what your costs will be.

What your doctor's prescription must include

Your doctor does not need to be a specialist to prescribe a prosthetic leg, but they must document why you need it. The prescription should state that the prosthetic is medically necessary — for example, because you have had an amputation, or because a condition like severe arthritis or nerve damage makes your leg unusable for walking.

The prescription should also describe the type of prosthetic you need. This might be as straightforward as "below-knee prosthesis" or more detailed if you have specific medical needs. Your doctor can work with your prosthetist to determine the right description. If your doctor is unsure what to write, the prosthetist can often help draft the language, but your doctor must sign the final order.

Keep a copy of the prescription for your records. You will need to show it to the prosthetist and may need to provide it to Medicare if there are questions about coverage later.

Finding a Medicare-enrolled prosthetist

Not all prosthetists accept Medicare. To find one who does, use the Medicare provider search tool on Medicare.gov, or call Medicare at 1-800-MEDICARE. You can search by your zip code and the type of provider (orthotist and prosthetist, or O&P).

When you contact a prosthetist, ask directly: "Do you accept Medicare assignment?" This means they agree to bill Medicare and accept what Medicare approves as full payment for covered services. If they do not accept assignment, you will owe any difference between their charge and Medicare's approved amount.

You can see more than one prosthetist before deciding. Each one can give you an estimate of what your out-of-pocket cost will be based on the type of prosthetic recommended and your deductible status. Comparing estimates can help you understand your costs and find a provider you are comfortable working with.

How often Medicare covers replacement prosthetics

Medicare covers one prosthetic leg every five years under the standard replacement schedule. This means if you received a prosthetic in 2020, Medicare would typically cover a replacement in 2025 or later.

However, faster replacement may be covered if your circumstances change. For example, if your prosthetic is damaged beyond repair, if your residual limb (the remaining part of your leg) changes size significantly, or if your medical condition worsens, you may be able to get a replacement sooner. Your doctor must document the reason and submit a new prescription to Medicare.

Repairs and adjustments to your existing prosthetic are usually covered separately from the replacement schedule. If your prosthetic needs a minor fix or adjustment, contact your prosthetist about coverage for that service.

Advanced features and add-ons that may cost extra

Basic prosthetic legs are covered by Medicare, but advanced features often are not. A microprocessor knee (a computerized knee that adjusts to your walking speed) may cost thousands of dollars more than a mechanical knee. Specialized materials, custom cosmetic covers, or high-tech components designed for running or sports are typically not covered.

If you want an advanced feature, you have two options. You can pay the full cost yourself, or you can ask your prosthetist whether the difference between the basic prosthetic and the advanced one can be separated. Sometimes you can receive the Medicare-covered basic prosthetic and then purchase the upgrade out of pocket. Discuss this with your prosthetist and your insurance before making a decision.

Some Medicare Advantage plans cover certain advanced features that Original Medicare does not. If you have a Medicare Advantage plan, contact your plan to ask what prosthetic features are covered beyond the basic device.

What to do if Medicare denies your claim

If Medicare denies coverage for your prosthetic leg, you have the right to appeal. The denial notice will explain why Medicare said no and will include instructions for filing an appeal. You typically have 120 days from the date of the denial to appeal.

Common reasons for denial include: your doctor's prescription did not clearly state medical necessity, your prosthetist is not enrolled with Medicare, or Medicare determined the prosthetic is not medically necessary based on your condition. If the reason is unclear, call Medicare at 1-800-MEDICARE and ask for an explanation.

You can ask your doctor or prosthetist to help you appeal. They can provide additional documentation or clarify information that was missing from the original claim. Many appeals are successful when the right information is provided the second time.

Frequently Asked Questions

Does Medicare Part D cover prosthetic legs?

No. Part D covers prescription drugs only. Prosthetic legs are covered under Part B (medical equipment and services). Make sure you have Part B active when you need your prosthetic.

What if I have both Medicare and Medicaid?

Medicaid rules vary by state, but many state Medicaid programs cover prosthetics and may cover features that Medicare does not. Contact your state Medicaid office to learn what is covered in your state. Medicare is the primary payer, so it pays first, and Medicaid may cover some of your remaining costs.

Can I get a prosthetic leg while I am still in the hospital after amputation?

Hospital stays are covered by Part A, not Part B. Prosthetics ordered during a hospital stay may be billed to Part A or Part B depending on the timing and your discharge plan. Ask the hospital social worker or case manager how the prosthetic will be billed and whether you will owe anything at discharge.

What if my prosthetic wears out before five years?

If your prosthetic fails due to normal wear or a defect, Medicare may cover a replacement sooner than five years. Your prosthetist can submit a claim with documentation of the failure. Keep records of any repairs or adjustments, as these help support a claim for earlier replacement.

Do I need prior approval from Medicare before ordering a prosthetic?

Not always. Many prosthetists will submit the claim after the prosthetic is made and fitted. However, some situations require prior approval — your prosthetist will know whether it is needed for your specific device. Ask before your fitting appointment so there are no surprises with billing.