What Medicare Covers (and Doesn’t) for DurableMedical Equipment

Most people first learn how Medicare handles durable medical equipment when they need a piece of it. That’s a hard time to be learning. The rules are specific, the paperwork matters, and the difference between a covered item and an uncovered one can be a few thousand dollars. This article walks through the basics — what Medicare covers, how it covers it, and where the gaps tend to be — so the system feels less like a maze when you actually need to use it.

What “durable medical equipment” actually means

Medicare uses a specific definition for durable medical equipment, often shortened to DME. To qualify, an item generally needs to:

• Be durable enough to withstand repeated use

• Be used for a medical reason

• Not be useful to someone who isn’t sick or injured

• Be expected to last at least three years

• Be appropriate for use in the home

That last point matters more than people expect. Medicare’s DME benefit is built around the home, not the hospital. Equipment used during a hospital stay is part of the hospital bill. DME is what you use after you go home — or what helps you stay home in the first place.

Common DME includes wheelchairs (manual and power), walkers, canes, hospital beds, oxygen equipment, CPAP machines, blood sugar monitors, nebulizers, patient lifts, and certain bathroom safety equipment when prescribed for a specific medical reason. Less obvious examples include some prosthetics and orthotics, and certain types of ostomy and diabetic supplies.

How the coverage works

DME is covered under Medicare Part B, which is the outpatient and physician-services side of original Medicare. The mechanics are the same as for most Part B services:

You pay an annual Part B deductible (the amount changes each year — your “Medicare & You” handbook or Medicare.gov will have the current figure). After the deductible is met, Medicare typically pays 80% of the Medicare-approved amount for the equipment, and you pay the remaining 20%. If you have a Medigap (supplemental) policy, that 20% may be covered by the supplement. If you have Medicaid in addition to Medicare, Medicaid often covers it as well.

People with Medicare Advantage plans (Part C) have similar coverage, but the specifics — networks, prior authorization rules, supplier choices — vary by plan. If you’re on a Medicare Advantage plan, the rules in your specific plan documents take precedence over the general Medicare rules described here.

The medical-necessity standard

Medicare doesn’t cover equipment because someone wants it. It covers equipment because a doctor prescribes it for a documented medical reason. This shows up in three places:

The prescription.

A physician (or in some cases a nurse practitioner or physician assistant) has to prescribe the equipment in writing, after a face-to-face evaluation that documents the need. For more expensive items like power wheelchairs, the documentation requirements are stricter and the evaluation is more involved.

The supplier.

Medicare only pays for DME ordered through a Medicare-enrolled supplier. Going outside that network means paying out of pocket, even if the equipment itself would otherwise be covered. For some equipment categories, Medicare also has a competitive bidding program that limits which suppliers can provide certain items in certain regions.

The use case.

The equipment has to be for use in the home, for a medical reason. A walker prescribed because you can’t safely move around your home is covered. A walker for vacation travel isn’t. If any of those three pieces is missing, the claim can be denied — even if everything else is in order.

Rental vs. purchase

Medicare doesn’t always buy equipment outright. For many items, Medicare rents the equipment from a supplier on your behalf, paying the supplier monthly. After 13 months of rental, you generally own the equipment.

Some items are rental-only. Some are purchase-only. Some are “capped rental” with the 13-month transition to ownership. The specific category an item falls into affects how the costs work and what happens if the equipment needs replacement or repair. The supplier should be able to tell you which category your equipment falls into; if they can’t or won’t, that’s a sign to look at a different supplier.

For complex, custom-fitted items like power wheelchairs, the rules are different again — there are options for purchase from the start when the equipment is custom-configured to your body. This matters because rental rules don’t always work well for equipment that isn’t transferable between users.

Replacement, repair, and the five-year rule

Most DME has an expected useful lifetime. For wheelchairs, that’s generally five years; for hospital beds, similar; for smaller equipment like walkers, less. Within that window, repairs are covered if the equipment fails through normal use. Replacement before the window is up requires documentation that the existing equipment no longer meets your medical needs — which is harder than it sounds, because Medicare’s default position is that the existing equipment should be repaired rather than replaced. After the useful lifetime expires, replacement is covered if the medical need continues. Replacement requires a fresh prescription and, depending on the item, a fresh evaluation.

Repair is its own challenge in rural Montana. Medicare-enrolled DME repair suppliers are concentrated in larger population centers, and getting a wheelchair repaired in a small town often means transporting it to Billings, Missoula, Great Falls, or Helena, or arranging for a technician to drive out. Building this into your timeline matters — if your wheelchair breaks, you may not have backup mobility for the days or weeks the repair takes.

Where the coverage gaps tend to show up

Several common needs aren’t covered by Medicare DME, and learning this when you’re already in the middle of needing the item is hard. The biggest ones:

Wheelchair ramps

Medicare specifically excludes ramps from DME coverage. Even when a covered wheelchair sits unused because the home isn’t accessible, Medicare won’t cover the ramp that solves the problem. Stairlifts and most other home modifications are excluded for the same reason.

Bathroom modifications

Grab bars, walk-in tubs, roll-in showers, and other bathroom accessibility modifications generally aren’t covered by Medicare. Some bathroom safety equipment is covered when prescribed for a specific medical reason — a raised toilet seat after hip surgery, a transfer bench for someone with a balance disorder — but structural modifications aren’t.

Items considered “convenience” rather than medical necessity

The line between medical necessity and convenience is drawn by Medicare reviewers, and it doesn’t always match how it feels to the person using the equipment. Seat elevators on power wheelchairs, certain cushion upgrades, specialized controls — these can be denied as not medically necessary even when they meaningfully change what the equipment can do. Many of these denials are appealable.

Disposable supplies that aren’t covered as DME

Adult briefs, most over-the-counter mobility aids, ordinary support cushions, and similar consumable items generally aren’t covered.

Equipment for use outside the home

A wheelchair you use only for community outings isn’t covered the same way as one you use at home. The home-use requirement is taken seriously.

What Medicaid adds in Montana

For people with Medicare and Medicaid both, Medicaid can fill some of these gaps. Montana Medicaid covers a broader range of DME than Medicare alone, and certain Medicaid waiver programs cover home modifications, ramps, and other items that Medicare excludes. Eligibility for these programs is narrower than for Medicaid generally, and the application process takes time, but for people who qualify they can be a meaningful resource.

We’ll cover Montana Medicaid waivers in more depth in a separate article (see, Montana Medicaid Waiver article). For now, if you have both Medicare and Medicaid and you’re running into a Medicare exclusion, the next call to make is to your Medicaid case manager (if you have one) or to the Montana Department of Public Health and Human Services.

Where to start when you need DME

A few practical steps for someone navigating DME coverage for the first time, whether for themselves or someone they’re caring for:

Start with your provider. The prescription and the documentation of medical necessity originate there. Be specific about what the person can and can’t do, what the equipment is for, and why standard alternatives won’t work — that information is what makes the difference between a strong prescription and a weak one.

Choose a Medicare-enrolled supplier. Medicare.gov has a supplier directory searchable by ZIP code and equipment type. For specialized equipment, the supplier matters as much as the prescription — a supplier who specializes in complex rehab will configure a power wheelchair very differently from one who fills general orders.

Ask about the rental-vs-purchase rules upfront. Different items have different rules. Knowing how your specific equipment is handled affects what the costs look like and what happens at the 13-month mark. Keep records. Save every prescription, evaluation report, supplier invoice, denial letter, and approval. Insurance navigation often comes down to producing the right document at the right time. Appeal denials. Initial denials happen for reasons that range from genuinely correct to administratively careless. If the denial doesn’t match your understanding of the medical situation, the appeal process exists for a reason. The deadlines are short, so don’t let denials sit. Ask for help when you need it. Medicare DME rules are genuinely complicated, and most people who navigate them well had someone show them how the first time. Hospital social workers, case managers, occupational therapists, Centers for Independent Living, the Montana State Health Insurance Assistance Program (SHIP), and programs like BSILS exist in part to be that someone.

How BSILS fits

Big Sky Independent Living Solutions (BSILS) accepts donated mobility, accessibility, and daily-living equipment and connects it with Montanans who need it at no cost. We don’t replace insurance coverage — we exist for the gaps that insurance doesn’t fill, the timelines that don’t line up, and the items that for whatever reason aren’t going to come through the standard channels. When BSILS doesn’t have what someone needs, we try to point them toward the right next step, whether that’s MonTECH, a Center for Independent Living, a Habitat for Humanity affiliate, or a clinical resource that can help with the documentation side.

If you’re navigating Medicare DME coverage and want a sounding board, contact us. We can’t make Medicare decisions for you, but we can often help you figure out which question to ask next.

This article provides general information about how Medicare durable medical equipment coverage works. It is not legal, medical, financial, or insurance advice for your specific situation. Medicare rules change, and specifics vary by plan and by year. For decisions about your case, please consult Medicare directly (1-800-MEDICARE), your healthcare provider, your insurance plan, or the Montana State Health Insurance Assistance Program (SHIP). If you are not sure where to start, contact us — we are happy to help you find the right local resource.