Reusable medical equipment for long-term use at home: wheelchairs, walkers, hospital beds, oxygen concentrators, CPAP machines, glucose meters, lift chairs, etc. Medicare Part B covers 80% of approved DME for eligible patients with a prescription; the remaining 20% comes out of pocket or via Medigap.
What it means in practice
DME is the reusable equipment a patient uses at home for medical reasons. Medicare's standard is "withstands repeated use, primarily and customarily used to serve a medical purpose, generally not useful in the absence of illness or injury, appropriate for use in the home." That defines what qualifies (e.g., a wheelchair) vs. what doesn't (e.g., a regular bed, since beds are useful for non-medical purposes).
Medicare Part B coverage for DME requires three things: (1) a physician's prescription, (2) the supplier must be Medicare-enrolled (and for many items, must meet competitive-bidding contract requirements in the patient's ZIP code), and (3) the equipment must meet medical-necessity criteria spelled out in CMS Local Coverage Determinations. Some items have strict documentation requirements that the prescribing doctor's office handles; others rent first (with monthly Medicare payments) then convert to ownership after a "capped rental" period.
Common DME categories families encounter:
• **Mobility**: standard walker (often $50-100, fully covered with $20-40 patient share), rollator with seat, manual wheelchair, power wheelchair, scooter, lift chair (for the lift mechanism — the chair itself isn't covered)
• **Bed equipment**: hospital bed, trapeze, alternating-pressure mattress (for wound prevention), bedside commode
• **Respiratory**: home oxygen (concentrator + tanks), CPAP/BiPAP, nebulizer
• **Diabetes**: glucose meter, test strips, continuous glucose monitor (CGM — increasingly covered), insulin pump
• **Daily living**: shower chair, raised toilet seat, grab bars (these are typically NOT covered — Medicare considers them "convenience items"; families pay out-of-pocket)
The 20% patient coinsurance has no annual cap on original Medicare (Medigap covers it; Medicare Advantage has its OOP max).
What's often NOT covered: home modifications (ramps, doorway widening), most personal-care items (incontinence supplies, except in specific cases), most home-safety items (grab bars, non-slip mats). Some Medicare Advantage plans add benefits for these as supplemental coverage; check your parent's specific plan.