How to Find Medicare-Approved Durable Medical Equipment Suppliers

After a hospital discharge, a fall, or a new diagnosis, your parent may need equipment to manage safely at home — a walker, a hospital bed, a CPAP machine for sleep apnea, a power wheelchair, or an oxygen concentrator. Medicare Part B covers a significant portion of these costs, but there's a catch: the supplier must be enrolled with Medicare and must be authorized to bill Medicare for the specific category of equipment your parent needs.

If you or your parent chooses a supplier who isn't enrolled with Medicare — or who isn't approved for the particular item — Medicare won't pay, and your parent could be on the hook for the full cost.

This guide explains how durable medical equipment (DME) coverage works under Medicare, how to find approved suppliers, and the common mistakes caregivers make when sourcing equipment for an elderly parent.

What Medicare Covers Under Durable Medical Equipment

Medicare Part B covers durable medical equipment when three conditions are met:

1. A doctor certifies medical necessity — your parent's physician must document that the equipment is medically necessary for treating a diagnosed condition.
2. The equipment meets Medicare's definition of DME — it must be durable (able to withstand repeated use), primarily medical in nature, used in the home, and have an expected lifespan of at least three years.
3. The supplier is enrolled with Medicare — the supplier must have an active Medicare enrollment and be approved to furnish the specific type of equipment.

When these conditions are met, Medicare Part B pays 80% of the Medicare-approved amount. Your parent (or their Medigap supplement, if they have one) pays the remaining 20%. For Medicare Advantage plan members, the plan's own cost-sharing structure applies instead.

Common items covered under Medicare DME include:

• Walkers, canes, and crutches
• Manual and power wheelchairs and scooters
• Hospital beds for home use
• CPAP machines and supplies for sleep apnea
• Oxygen equipment and supplies
• Nebulizers for respiratory conditions
• Blood glucose monitors and testing supplies for diabetics
• Infusion pumps
• Lift chairs (the lifting mechanism only — not the seat or frame)

What Medicare does NOT cover under DME: comfort items (regular mattresses, bath chairs that don't meet specifications), items that are not primarily medical in nature, or equipment the doctor did not certify as medically necessary.

The Enrollment Requirement: Why Supplier Choice Matters

Medicare maintains a national database of enrolled DME suppliers. A supplier cannot legally bill Medicare for equipment unless they are actively enrolled. Enrollment requires the supplier to meet specific accreditation standards, pass site inspections, and agree to billing rules.

This system exists because DME billing has historically been one of Medicare's most fraud-prone categories. Fraudulent suppliers would bill Medicare for equipment never delivered, or for expensive items when cheaper alternatives were appropriate. The accreditation and enrollment requirements were tightened significantly to address this.

For your family, the practical implication is this: before your parent accepts equipment from any supplier, verify that supplier is enrolled with Medicare. This is not an assumption you can make based on the supplier saying they "work with Medicare" or "accept Medicare."

How to Find and Verify Medicare-Approved DME Suppliers

Step 1: Use Medicare's Supplier Directory

The official tool is the Medicare Supplier Directory at Medicare.gov. Go to Medicare.gov and search for "durable medical equipment supplier" or navigate to the "Find care" section. You can search by zip code and equipment type.

Alternatively, call 1-800-MEDICARE (1-800-633-4227). A representative can help identify enrolled suppliers in your parent's area for specific equipment.

Step 2: Verify Enrollment Independently

For higher-cost equipment (power wheelchairs, home oxygen), it is worth verifying the supplier's Medicare enrollment status through the PECOS system (Provider Enrollment, Chain, and Ownership System) at pecos.cms.hhs.gov. A search by supplier name or NPI number confirms active enrollment status.

Step 3: Ask for the Supplier's Medicare Supplier Number

Every enrolled Medicare supplier has a unique Medicare Supplier Number. Ask any supplier you contact to provide this number. If they can't produce it, that is a significant red flag.

Step 4: Check for Accreditation

Medicare-enrolled DME suppliers are required to be accredited by a CMS-approved accreditation organization. The major ones are the Accreditation Commission for Health Care (ACHC) and The Joint Commission. You can verify accreditation through the accrediting body's public lookup tools.

Competitive Bidding: How Medicare Selects Suppliers in Your Area

For common, high-volume DME items (CPAP supplies, walkers, standard wheelchairs, hospital beds, and others), Medicare uses a Competitive Bidding Program. This means that in certain metro areas, only specific "contract suppliers" can furnish those items to Medicare beneficiaries.

If your parent lives in a competitive bidding area and they use a non-contract supplier for a competitively bid item, Medicare will not pay — even if that supplier is otherwise enrolled with Medicare.

How to check: Medicare.gov has a competitive bidding lookup tool where you enter your parent's zip code and the type of equipment to see if competitive bidding applies and which suppliers hold contracts.

This is particularly relevant for CPAP equipment, oxygen, and standard wheelchairs — the most common items where families get caught off guard.

The Assignment Rule: Protect Your Parent From Balance Billing

When a Medicare-enrolled supplier "accepts assignment," they agree to accept the Medicare-approved amount as payment in full. They bill Medicare the 80%, collect the 20% coinsurance from your parent (or their Medigap plan), and cannot charge more.

Non-participating suppliers who don't accept assignment can charge up to 15% above the Medicare-approved amount as an "excess charge" — and your parent is responsible for it.

When sourcing equipment for your parent, always ask:

• "Do you accept Medicare assignment?"
• "What will my parent owe out-of-pocket after Medicare pays?"

Get this in writing before equipment is delivered. Surprise DME bills are a common source of frustration for families who assumed Medicare "took care of it."

The Rent-vs.-Buy Rules for DME

Medicare has specific rules about whether equipment is rented or purchased, which affects the long-term cost to your parent:

Capped rental items (CPAP, oxygen concentrators, most power wheelchairs): Medicare rents these for 13 months, then ownership automatically transfers to your parent. During the rental period, your parent pays 20% of the monthly rental fee. After month 13, the supplier must continue providing maintenance and supplies as needed.

Purchased items (walkers, manual wheelchairs, hospital beds in some cases): These are purchased outright, with your parent paying 20% of the purchase price upfront.

For oxygen equipment specifically, the rental period is 36 months before ownership transfer, and the supplier must continue providing oxygen and maintaining the equipment for the duration of Medicare's coverage period.

Understanding whether equipment is rented or purchased tells you how long the cost-sharing obligation continues — important for budgeting a parent's healthcare expenses.

When Your Parent Needs a Power Wheelchair or Scooter

Power wheelchairs and mobility scooters are among the most frequently fraud-targeted categories in DME, which has led Medicare to impose particularly strict documentation requirements.

For Medicare to cover a power wheelchair:

• A physician or qualified practitioner must conduct an in-person examination of your parent
• The documentation must demonstrate that your parent cannot perform mobility-related activities of daily living using a less expensive alternative (cane, walker, or manual wheelchair)
• The prescribing physician must maintain specific written records

Many families are approached by suppliers who promise a "free" scooter and will "handle all the Medicare paperwork." This is a significant red flag — it often involves billing Medicare for equipment that doesn't meet the medical necessity standard, which can expose your parent to liability for the fraudulent claim. The equipment should start with your parent's own physician, not with a supplier cold-calling or soliciting at health fairs.

A Practical Checklist for Sourcing DME for Your Parent

Before your parent takes delivery of any Medicare-covered equipment:

• [ ] Confirm the item is covered under Medicare Part B for your parent's diagnosis
• [ ] Obtain a written prescription/order from your parent's doctor
• [ ] Verify the supplier is enrolled with Medicare (use Medicare.gov or call 1-800-MEDICARE)
• [ ] Check if competitive bidding applies in your parent's zip code
• [ ] Confirm the supplier accepts Medicare assignment
• [ ] Get a written estimate of what your parent will owe after Medicare pays
• [ ] For power wheelchairs, confirm the prescribing process started with your parent's physician
• [ ] Keep all paperwork: prescription, delivery confirmation, supplier's Medicare Supplier Number

Medicare's DME coverage rules are detailed, and getting them wrong can result in significant unexpected costs for your family. The Medicare Enrollment Guide covers DME, equipment coverage, and dozens of other Medicare topics that matter for adult children helping elderly parents navigate the system. Get the guide here.