Durable medical equipment, commonly called DME, is medical equipment designed for repeated, long-term use in your home. It includes things like wheelchairs, hospital beds, walkers, oxygen equipment, and CPAP machines. The term matters because it defines an entire category of items that Medicare and most private insurers cover under specific rules, and understanding those rules can save you significant money.
The Four Criteria That Define DME
For an item to qualify as durable medical equipment under Medicare’s definition, it must meet all four of these criteria:
- It can withstand repeated use. The item is sturdy enough that it could be rented out to multiple patients over time. This is the “durable” part, and it’s what separates DME from disposable medical supplies like bandages, syringes, or incontinence pads.
- It serves a medical purpose. The item’s primary function is treating or managing a medical condition, not general comfort or convenience.
- It’s not useful without an illness or injury. A healthy person wouldn’t have a reason to use it. This is why items like air conditioners or humidifiers typically don’t qualify, even if a doctor recommends them.
- It’s appropriate for home use. The equipment needs to make sense in a home setting, not just in a hospital or clinic.
If an item fails even one of these tests, it won’t be classified as DME regardless of how medically helpful it is. That distinction determines whether your insurance pays for it under DME benefits or whether you need to look at other coverage categories.
Common Examples of DME
The range of equipment that qualifies is broad. Mobility aids like wheelchairs, walkers, canes, and crutches are some of the most commonly covered items. Oxygen equipment, including concentrators and portable tanks, falls squarely in this category. So do hospital beds, patient lifts, and pressure-reducing mattresses for people at risk of bedsores.
Blood sugar monitors for people with diabetes qualify, along with continuous glucose monitors and insulin pumps. CPAP and BiPAP machines for sleep apnea are another major category. Nebulizers for respiratory conditions, suction pumps, and traction equipment also count. Even some less obvious items like commode chairs and infusion pumps can qualify when medically necessary.
What Doesn’t Count as DME
Items that get used once and thrown away are medical supplies, not durable medical equipment. Surgical dressings, disposable gloves, catheters, and test strips fall into this separate category. Medicare and private insurers often cover these items, but under different rules and sometimes different parts of your plan.
Convenience items also don’t qualify. Grab bars, raised toilet seats, shower chairs, and bath benches exist in a gray area. Some may be covered depending on your specific plan and medical situation, but many are considered safety or convenience items rather than DME. The same goes for items primarily used for exercise or general wellness, even when a doctor prescribes them.
How Medicare Covers DME
Medicare Part B covers medically necessary DME when a doctor or other healthcare provider orders it for use in your home. Two conditions must be met: your doctor must certify that you need the equipment, and the supplier providing it must be enrolled in Medicare. If you get equipment from a supplier that isn’t enrolled, Medicare won’t pay, and you could be responsible for the full cost.
For most DME, Medicare pays 80% of the approved amount after you’ve met your annual Part B deductible. You pay the remaining 20%. If your supplier accepts Medicare assignment, they agree to charge only the Medicare-approved amount, which keeps your out-of-pocket costs predictable. If they don’t accept assignment, your costs can be higher.
Renting vs. Owning Equipment
Not all DME is purchased outright. Medicare categorizes equipment into rental and purchase groups, and the rules differ depending on the type of item.
For items like CPAP machines, hospital beds, and pressure-reducing mattresses, Medicare treats the arrangement as a rental. You make monthly rental payments (covering your 20% share) for 13 months, and then you own the equipment. During the rental period, the supplier is responsible for any necessary maintenance or repairs.
Oxygen equipment works differently. Medicare makes rental payments for 36 months. After that, payments stop, but your supplier must continue providing the equipment, accessories, and supplies at no additional rental charge through the end of the equipment’s useful lifetime, which is generally five years from the original delivery date.
Some less expensive or frequently replaced items are simply purchased rather than rented. Canes, crutches, and walkers typically fall into this category.
Repairs and Replacements
Once you own a piece of DME, the original supplier isn’t required to repair it. You can use any Medicare-enrolled supplier for maintenance and repairs. Medicare covers 80% of the approved repair cost, up to the cost of replacing the item entirely. You pay the other 20%.
Replacement is covered when equipment is lost, stolen, irreparably damaged, or has exceeded its reasonable useful lifetime. That lifetime is generally five years from the date you started using the item. If your wheelchair breaks down after six years of daily use, for instance, Medicare will cover a replacement rather than continued repairs on aging equipment.
The Competitive Bidding Program
Medicare uses a competitive bidding program to set prices for many DME items in specific geographic areas. Suppliers submit bids, and Medicare selects winners who become “contract suppliers” for that region. If you live in a competitive bidding area, you typically need to get your equipment from a contract supplier for Medicare to cover it at the standard rate.
This program is currently being updated. A new round of contracts is expected to take effect no later than January 2028, with a six-month transition period for people who need to switch from a non-contract supplier to a contract supplier. During transitions, the new supplier has six months to obtain fresh orders from your doctor if your previous supplier doesn’t transfer your paperwork.
A nationwide mail-order component is also being phased in for items typically shipped directly to patients, like diabetes supplies. Under this system, contract suppliers will serve all Medicare beneficiaries regardless of location.
Tips for Getting DME Covered
The most common reason DME claims get denied is incomplete documentation. Your doctor needs to provide a written order that includes a diagnosis and explains why the equipment is medically necessary. For some items, like power wheelchairs or certain respiratory devices, a face-to-face evaluation is required before the order can be written.
Before getting any equipment, confirm three things: that your doctor has submitted the necessary paperwork, that your supplier is enrolled in Medicare (you can verify this on Medicare.gov), and that the specific item is covered for your diagnosis. Asking the supplier for an advance cost estimate can prevent surprises. If a claim is denied, you have the right to appeal, and many initial denials are overturned when proper documentation is provided.
Private insurance plans generally follow similar principles for DME coverage, though the specific rules, cost-sharing amounts, and approved supplier networks vary. Check your plan documents or call your insurer before ordering equipment to understand what’s covered and what your share will be.