Does Medicare Cover Prosthetic Devices?

Medicare Part B covers external prosthetic devices as part of the Durable Medical Equipment, Prosthetics, Orthotics, and Supplies (DMEPOS) benefit. Coverage requires a doctor's order confirming the device is medically necessary to replace a body part or function. You must obtain your prosthetic from a Medicare-enrolled supplier for coverage to apply.

After meeting the 2026 Part B deductible of $283, Medicare pays 80% of the Medicare-approved amount and you pay 20% coinsurance. Prosthetic devices can be expensive. A basic below-knee prosthetic leg may cost $5,000 to $15,000, while advanced microprocessor-controlled limbs can exceed $50,000. Your 20% coinsurance on a $10,000 prosthetic would be $2,000, which is why many beneficiaries pair Original Medicare with a Medigap plan to cover this cost-sharing.

Medicare also covers necessary repairs, adjustments, and replacements for prosthetic devices. Replacements are covered when the device is lost, stolen, irreparably damaged, or no longer meets your medical needs due to a change in condition. Unlike standard DME, prosthetic limbs are not subject to the typical 5-year reasonable useful lifetime (RUL) restriction for replacements.

For lower-limb prosthetics (artificial legs, feet, and knees), Medicare uses the Medicare Functional Classification Level (MFCL) system, commonly called K-levels, to determine which prosthetic components are appropriate for you. Your doctor or prosthetist evaluates your current or expected functional ability and assigns a K-level from K0 to K4. This classification directly determines which prosthetic components Medicare will cover.

K0 means you have no ability or potential to ambulate or transfer with a prosthesis. Medicare generally does not cover a lower-limb prosthetic for K0 patients. K1 means you can use a prosthesis for transfers or limited household ambulation. K2 means you can ambulate in the community with the ability to traverse low-level environmental barriers. K3 means you can ambulate with variable cadence and have the ability to traverse most environmental barriers. K4 means you exceed basic ambulation and may engage in high-impact activities.

Higher K-levels qualify you for more advanced (and more expensive) prosthetic components. For example, a microprocessor-controlled knee is typically covered only for K3 and K4 patients. If your doctor or prosthetist believes you need a component that exceeds your current K-level classification, they must provide documentation justifying the medical necessity. Getting your K-level assessment right is critical to receiving the appropriate prosthetic device.

CMS requires prior authorization for certain lower-limb prosthetics in select states. This means your supplier must submit a request to Medicare before providing the device, and Medicare must approve it before coverage is confirmed. Prior authorization applies to items on the Required Prior Authorization List, which primarily includes higher-cost lower-limb prosthetic components.

The prior authorization process requires your doctor and prosthetist to submit documentation proving medical necessity, including your K-level assessment, clinical notes, and a detailed prescription. Approval typically takes 10 business days. If prior authorization is denied, you have the right to appeal. Your prosthetist should handle the prior authorization process, but it is important to ask about timelines so you can plan accordingly.

Prior authorization does not apply to all prosthetic devices. Upper-limb prosthetics, breast prostheses, cochlear implants, and most other prosthetic devices do not require prior authorization. Always ask your supplier whether prior authorization is needed for your specific device.

When a prosthetic device is surgically implanted during an inpatient hospital stay, Medicare Part A covers the device as part of the hospital services. This includes cochlear implants, cardiac pacemakers, artificial joints (hip and knee replacements), intraocular lenses after cataract surgery, and other implanted devices. The 2026 Part A deductible of $1,736 per benefit period applies.

If the same device is implanted during an outpatient procedure, Medicare Part B covers it instead. The coverage is the same regardless of which part of Medicare pays, but your cost-sharing differs. Under Part A, you pay the inpatient deductible. Under Part B, you pay 20% coinsurance after the $283 deductible. Your doctor and hospital will determine whether the procedure is performed on an inpatient or outpatient basis.

All Medicare Advantage plans must cover prosthetic devices at least as comprehensively as Original Medicare. However, your cost-sharing (copays or coinsurance), network restrictions, and prior authorization requirements may differ. Many MA plans have a maximum out-of-pocket (MOOP) limit of $9,250 in 2026, which caps your total annual spending on covered services including prosthetics.

This MOOP cap can be a significant advantage for beneficiaries who need expensive prosthetic devices. Under Original Medicare with no Medigap plan, your 20% coinsurance on a $50,000 prosthetic limb would be $10,000. Under a Medicare Advantage plan, your costs would be capped at the plan's MOOP limit. However, MA plans may require you to use in-network suppliers, which could limit your choice of prosthetist.

A Medicare Supplement (Medigap) plan helps pay the 20% Part B coinsurance for Medicare-approved prosthetic devices. Given the high cost of many prosthetics, this benefit can save you thousands of dollars. With a Medigap Plan G, you would pay the $283 Part B deductible and then owe $0 for the prosthetic device because Plan G covers 100% of Part B coinsurance.

For a $10,000 prosthetic limb, the difference is significant: without Medigap you would owe $2,000 in coinsurance; with Plan G you would owe $0 (after the $283 deductible). Medigap also has no provider networks, so you can use any Medicare-enrolled prosthetist or supplier nationwide. This flexibility can be important for beneficiaries who need specialized prosthetic services that may not be available locally.