Getting Medicare to cover your walker, wheelchair, CPAP machine, or hospital bed doesn’t have to be complicated — but it does require following the right steps in the right order.
Every year, thousands of Medicare beneficiaries have legitimate claims denied simply because a piece of paperwork was missing, the wrong supplier was used, or the doctor’s prescription didn’t include the right language. This guide walks you through exactly how the Medicare DME approval process works, what you need to prepare, and how to avoid the mistakes that lead to denials.
Understanding the Basics: What Medicare Will and Won’t Cover
Before you start the process, it helps to understand what Medicare Part B covers under durable medical equipment. The short version: Medicare covers equipment that is medically necessary, prescribed by a doctor, and intended for use in your home.
Covered items include walkers, rollators, manual and power wheelchairs, mobility scooters, hospital beds, home oxygen equipment, CPAP machines for sleep apnea, blood glucose monitors, insulin infusion pumps, prosthetics, and orthotics. For a complete breakdown of what’s covered, see our Medicare DME coverage overview.
What Medicare does not cover: hearing aids, eyeglasses, comfort items (like a standard recliner), and equipment used only outside the home. If an item doesn’t meet Medicare’s definition of “durable medical equipment” — meaning it’s designed for repeated use over at least three years — it won’t be covered under Part B.
Step 1: Get the Right Prescription from a Medicare-Enrolled Doctor
The single most common reason DME claims are denied is an inadequate prescription. Medicare requires a written order from a physician, nurse practitioner, physician assistant, or clinical nurse specialist who is enrolled in Medicare. The prescription must include:
- Your diagnosis (the specific medical condition requiring the equipment)
- A statement of medical necessity (why this equipment is needed for your condition)
- A home-use statement (that the equipment will be used in your residence)
- The doctor’s signature and NPI number
Vague language gets claims denied. Compare these two examples:
- Too vague: “Patient needs a walker.”
- Sufficient: “Patient has Stage 2 Parkinson’s disease with gait instability and documented fall risk. Rollator walker is medically necessary for safe ambulation in the home to prevent further falls and maintain independence.”
The second version gives Medicare’s reviewers exactly what they need to approve the claim. Ask your doctor explicitly to include the diagnosis code (ICD-10), the specific equipment needed, and why alternatives would be inadequate.
If your doctor is unsure what Medicare requires, they can consult the Medicare Coverage Database or contact their Medicare Administrative Contractor (MAC). Many doctors’ offices have a billing staff member who handles this regularly.
Step 2: Verify Your Doctor Is Enrolled in Medicare
Your prescribing doctor must be enrolled in Medicare — not just licensed to practice medicine. This is a distinction many patients and even some healthcare providers overlook.
A doctor who is not enrolled in Medicare (or who has opted out) cannot write a valid prescription for Medicare DME, even if they are otherwise fully licensed. Before your appointment, confirm your doctor’s Medicare enrollment status by calling 1-800-MEDICARE (1-800-633-4227) or by searching on Medicare.gov’s Care Compare.
If your regular doctor is not Medicare-enrolled, you may need a referral to a specialist who is, or you can ask your primary care provider to complete Medicare enrollment — it typically takes 30–60 days.
Step 3: Find a Medicare-Enrolled Supplier Who Accepts Assignment
Even with a perfect prescription, your claim will be denied if you purchase or rent equipment from a supplier who is not enrolled in Medicare. Before you order anything, ask every supplier two questions:
- Are you enrolled in Medicare?
- Do you accept assignment?
A supplier who “accepts assignment” agrees to accept the Medicare-approved rate as full payment. You pay your 20% coinsurance, and Medicare pays 80% — that’s it. A supplier who does not accept assignment can charge you up to 15% above the Medicare-approved rate, and you’re responsible for the difference.
To find Medicare-enrolled suppliers near you, use the official Medicare Supplier Directory at Medicare.gov. You can filter by equipment type and ZIP code. For additional guidance on locating approved providers, see our guide to finding Medicare DME suppliers near you.
Important note about competitive bidding areas: In certain metropolitan areas, Medicare uses a Competitive Bidding Program, which means you must use a contract supplier for specific categories of equipment or Medicare won’t pay. Your supplier should be able to tell you whether competitive bidding applies to your area and your specific equipment. Call 1-800-MEDICARE if you’re unsure.
Step 4: Determine Whether Prior Authorization Is Required
Some DME items require Medicare’s advance approval — called prior authorization — before you receive the equipment. If you get the equipment first and authorization is later denied, you may be responsible for the full cost.
As of 2026, items that require prior authorization include:
- Power-operated vehicles (scooters) and power wheelchairs
- Certain pressure-reducing support surfaces (specialty mattresses)
- Custom orthotics above a certain cost threshold
- Certain respiratory equipment
Your supplier should know which items in their inventory require prior authorization and will typically submit the request on your behalf. Prior authorization generally takes 10–20 business days. If you need equipment urgently, ask your doctor to document the urgency in the prescription — Medicare is required to respond to expedited requests within 72 hours.
Keep a copy of the prior authorization approval number. You’ll need it if there’s ever a dispute.
Step 5: Gather and Review All Documentation Before Submission
Your supplier submits the claim to Medicare directly — you don’t submit it yourself. But before they do, make sure you have copies of everything:
Documentation checklist:
- Written prescription with diagnosis, medical necessity statement, and home-use statement
- Doctor’s NPI number confirmed on the prescription
- Supplier’s Medicare enrollment number confirmed
- Prior authorization approval (if required for your equipment)
- Your Medicare card (or Medicare Advantage plan ID)
- Part B deductible status confirmed (have you already met your $283 deductible this year?)
Keeping your own copies protects you if the supplier loses something or submits the wrong information. Request copies before the supplier submits the claim — it’s much harder to get documentation after the fact.
Step 6: Understand How Medicare Pays — and What You Owe
Once the claim is submitted and approved, here’s how payment works in 2026:
- Annual Part B deductible: $283 (you pay this first)
- After deductible: Medicare pays 80% of the approved amount; you pay 20%
- Out-of-pocket cap (new in 2026): $2,700 maximum on all Part B costs for the year
Example: If your walker is approved at $300 and you’ve already met your deductible, Medicare pays $240 and you pay $60.
Some DME items are rented rather than purchased outright. Medicare pays rental fees for up to 13 months for items like power wheelchairs; after that, ownership transfers to you automatically. For oxygen equipment, Medicare pays for rental for 36 months; after that, the supplier must continue providing supplies at no additional charge for the remainder of the 5-year reasonable useful lifetime.
If you have a Medigap (Medicare Supplement) policy, it may cover your 20% coinsurance — check your plan documents. If you have Medicare Advantage (Part C), your DME goes through your plan, not through Original Medicare, and the process may differ.
Common Reasons Medicare Denies DME Claims
Knowing why claims get denied helps you prevent it. The most common denial reasons are:
1. Insufficient documentation of medical necessity The prescription didn’t clearly explain why the equipment is needed for the specific diagnosis. Fix: Ask your doctor to include the ICD-10 code, the clinical rationale, and a home-use statement.
2. Non-enrolled supplier The equipment came from a supplier who isn’t enrolled in Medicare. Fix: Always verify enrollment before ordering.
3. Wrong supplier in a competitive bidding area In some ZIP codes, only contract suppliers can provide certain equipment. Fix: Check with 1-800-MEDICARE before ordering.
4. Equipment not covered by Medicare Comfort items, hearing aids, and eyeglasses are excluded. Fix: Review Medicare’s coverage list before proceeding.
5. Missing prior authorization High-cost or complex items require advance approval. Fix: Ask your supplier upfront whether prior authorization is required.
6. Non-enrolled prescribing physician Your doctor isn’t enrolled in Medicare. Fix: Verify enrollment before your appointment.
If your claim is denied despite following these steps, don’t give up — the appeals process has a strong track record for seniors who pursue it. Our guide to appealing a Medicare DME denial walks you through each step.
What If You Need Equipment Before Approval Comes Through?
Sometimes you need equipment now — not in two weeks. If you’re in that situation, here are your options:
Option 1: Rent privately, then seek reimbursement. If you rent from a Medicare-enrolled supplier who accepts assignment, Medicare will reimburse retroactively once the claim is approved. Ask the supplier to submit a claim retroactively once prior authorization comes through.
Option 2: Request expedited prior authorization. Your doctor can document urgency, and Medicare must respond within 72 hours for expedited requests.
Option 3: Use a loaner from a hospital, rehab center, or nonprofit. Many hospitals and senior centers have equipment lending programs. The American Red Cross, local Area Agency on Aging, and community health organizations often lend equipment at no cost while permanent arrangements are made.
Option 4: Consider lower-cost alternatives temporarily. For mobility equipment specifically, there are affordable walkers and mobility aids available for purchase while the Medicare process works through. You can pursue Medicare coverage for a higher-quality or more specialized version in parallel.
Medicare Advantage and DME: Know the Differences
If you have a Medicare Advantage plan (Part C) instead of Original Medicare, your DME coverage runs through your plan — not through Medicare directly. Medicare Advantage plans are required by law to cover at least everything Original Medicare covers, but the rules, supplier networks, and cost-sharing can differ significantly.
Key differences to watch for with Medicare Advantage:
- Supplier networks: Your plan may require you to use in-network suppliers. Going out-of-network can dramatically increase your cost.
- Prior authorization requirements: Many Advantage plans require prior authorization for items that Original Medicare approves without it.
- Appeals process: You appeal to your plan first, then to Medicare’s Independent Review Organization if needed. Deadlines and procedures differ from Original Medicare.
Always call your Medicare Advantage plan before ordering any DME, even if you know Original Medicare would cover the item. Ask: “Does my plan cover this item? Do I need prior authorization? Which suppliers are in-network?”
Frequently Asked Questions
How long does Medicare DME approval take?
For standard items without prior authorization, claims are typically processed within 30 days after your supplier submits them. Items requiring prior authorization take an additional 10–20 business days. Expedited requests (for urgent medical need) must be answered within 72 hours.
Can I order DME online and still have Medicare cover it?
Yes — as long as the online supplier is enrolled in Medicare and accepts assignment. Many mail-order DME suppliers are Medicare-enrolled for items like diabetic supplies, CPAP equipment, and ostomy supplies. Always verify enrollment before ordering.
What if my doctor says the equipment is medically necessary but Medicare denies it?
A denial doesn’t mean Medicare disagrees with your doctor. It usually means the documentation was insufficient. Ask your doctor to write a detailed letter of medical necessity with your diagnosis codes, clinical history, and why the equipment is required. Then appeal — most denials based on documentation are overturned when additional clinical evidence is provided.
Does Medicare cover equipment I already own?
Generally no. Medicare covers new equipment or the rental of equipment going forward. If you purchased equipment before applying for Medicare coverage, the cost is typically not reimbursable.
Managing durable medical equipment alongside daily medications and healthcare routines takes organization. If you’re juggling multiple prescriptions, our guide to medication management for seniors can help you stay on top of it all.
