The two terms HME (Home Medical Equipment) and DME (Durable Medical Equipment) are used interchangeably. From a payer’s perspective, both terms are different and incorrect billing leads to claim denials. So, dealing with HME vs DME, it is essential to know that both DME and HME billing are different from each other. This article discusses each type in detail to help you understand about it and avoid the chances of revenue losses.
HME vs DME: What Each Term Actually Means
Durable Medical Equipment (DME) is a benefit category in the Medicare Part B insurance. The equipment must meet five conditions to get qualified for DME billing. Home Medical Equipment (HME), on the other hand, is a broader term. HME billing is related to the equipment required for home care. The additional part in the HME is all other types of supplies plus DME. Even the benefit categories that are not covered are a part of Home Medical Equipment (HME).
There is a Medicare supplier benefit family called DMEPOS (Durable Medical Equipment, Prosthetics, Orthotics, and Supplies). All the DME billing is managed under this category. The basic difference that can help understand the HME vs DME scenario is: everything billable as DME can be part of an HME; not everything an HME company supplies is billable as DME. The crux: DME is a benefit category, the other one is a market.
What is DME? The Five Medicare Conditions
An item qualifies as Durable Medical Equipment (DME) only if it:
- Can be used repeatedly and withstand the use, should not be disposable
- Has an expected life of at least 3 years
- Is used for medical purpose primarily
- Is generally not useful for someone who is not ill or injured
- Can be used in the home appropriately
What Is HME Billing?
To understand HME billing, it can be said that an HME company has several products that are used across many benefit categories. The HME company bills all the payers for every product in every category. For example, an HME company bills three products (hospital bed, wound dressings, bath-safety grab bar) for the same patient in three different ways. There is no rulebook for HME billing, so classification of the equipment before billing is essential.
Why the HME vs DME Distinction Moves Real Money
As mentioned earlier, the classification of benefits is important to know who is going to pay. Medicare does not process claims itself, for instance. It hires DME MAC under its own separate contractor system. If your billing team submits the claim to someone who is not authorized to pay you, it leads to a claim rejection. The DME claims are based on HCPCS Level II with modifiers depending on purchase or rentals. For other types of equipment billing, different ways are used. Whatever pathway is, it has its own documentation requirements.
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Get StartedHow DME Coding and Billing Works
Understanding the DME coding and billing services, it is important to know that it runs on its own system. It has a separate code set, documentation rules, and payment structures. Here is the track to understand who is paying for equipment.
The DME Code Set: HCPCS Level II
This code set is a separate catalog different from CPT codes. Most equipment codes are covered by E-codes. A special cluster of equipment that includes power mobility is covered by K-codes. For supplies, A-codes are used.
PDAC: Pricing, Data Analysis and Coding Contractor
This part matches the products with the codes for verification purposes. If you bill a code that is not verified by the PDAC, it leads to claim denial at the product level. Even after completing the documentation, if the product verification under a code fails, you cannot get paid.
How Medicare Pays: Rental, Oxygen, and Purchase
Medicare rents the equipment in most cases and does not buy it. Understanding the rental structure helps you know who owns equipment at the end.
| Payment category | How Medicare pays | What happens at the end |
|---|---|---|
| Capped rental — most equipment, including CPAP/BiPAP machines, hospital beds, and wheelchairs & power mobility devices | Monthly rental payments, up to 13 months of continuous use | Ownership transfers to the patient and payments stop. Switching suppliers does not restart the 13 months — the clock follows the patient. |
| Oxygen concentrators & equipment | Monthly rental payments for 36 months | Payments stop — but the supplier keeps ownership and must continue furnishing equipment and supplies through the machine’s five-year useful life. |
| Inexpensive / routinely purchased items | Purchased outright | The patient owns it from day one. |
Modifiers
Modifiers tell the payer how the claim is being paid and what proof stands behind it. RR is used for a rental month. NU represents a new purchase, UE shows a used purchase. NU represents a new purchase, UE shows a used purchase. The DME modifiers add meaning to the claim for the payers.
The Paperwork That Decides Who Pays
As the old forms (Certificates of Medical Necessity (CMNs) and DME Information Forms (DIFs)) are not used anymore, the chart and the written order are the proof now. The big items in the equipment require permission in advance. In DME insurance billing, each product category has a rulebook which is called Local Coverage Determination (LCD). This is created by DME Medicare Administrative Contractors (DME MACs). When Medicare won’t pay, the assignment of benefits and Advance Beneficiary Notice (ABN) decides who is going to pay.
HME vs DME: The Billing Difference
| Billing Factor | HME | DME |
|---|---|---|
| What it is | Industry umbrella term for home-care equipment & supplies | Defined Medicare Part B benefit category (5 conditions) |
| Who sets the rules | Each payer, item by item | CMS: federal definition plus LCD coverage rules |
| Codes | Varies by item, payer, benefit category | HCPCS Level II via the DME MACs |
| Supplier enrollment | Varies by payer, no single standard | Must enroll as a Medicare DMEPOS supplier: NPI, PECOS enrollment (form CMS-855S), CMS-approved accreditation, and a surety bond |
| Payment structure | Per payer contract; often bundled into home-health episodes | Capped rental (patient owns it after 13 months), oxygen’s separate 36-month rental rule, or outright purchase |
| Documentation | Payer-specific | Medical record + standard written order; prior authorization on listed items |
Common DME Denials and What Causes Them
- Billing an item as durable medical equipment and it fails the five conditions. For example, if a bath bench is billed in the DME benefit category, it will lead to a claim denial.
- In the current scenario where CMNs are not used, the records are the documentation. If the chart does not show the medical necessity, the claim won’t be paid.
- For equipment that needs prior authorization, if there is no advance permission, there is no payment.
- Incorrect modifiers lead to claim denials in DME billing scenarios and the claim is unreadable without accurate modifiers.
- If codes are not PDAC-verified, even after correct paperwork, the claims are lost at the product level.
- For DMEPOS billing, supplier NPI should be properly enrolled otherwise it will lead to rejection.
- Mishandling ABN and assignment of benefits lead to medical claims that are doubtful and delay payments.
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Frequently Asked Questions
Is HME the same as DME?
No. Durable Medical Equipment (DME) is a category defined by Medicare Part B and there are five conditions that an item needs to qualify. Home Medical Equipment (HME) is the term that is broader and covers DME supplies and items not covered by Medicare. Everything billable as DME can be part of an HME business but it does not happen the other way round.
What is the 13-month rule for DME?
A monthly rental is paid by Medicare for up to 13 months if it is used continuously. When does ownership change? After the 13th month, ownership transfers to the patient. Now, the rentals stop. A fact to remember here is that if the suppliers are changed, the rental period remains the same. The rental period is based on the patient, not the vendor.
Does Medicare cover CGMs as DME?
Yes. Continuous glucose monitors and their diabetic supplies are covered as Part B durable medical equipment for patients with diabetes who are treated with insulin or have a documented history of problematic hypoglycemia. That second pathway was added in the April 2023 coverage expansion, so coverage is no longer limited to insulin users. Patients also need an in-person or telehealth visit every six months to keep coverage active, which is where structured remote patient monitoring billing fits naturally into the workflow.
Do I still need a CMN for DME claims?
No. Certificates of Medical Necessity and DME Information Forms were discontinued for claims with dates of service on or after January 1, 2023. There are no separate forms used now. If payers want the proof, the supplier pulls it from the chart rather than filing a separate form.
Is DME competitive bidding active right now?
Not at the moment. The DMEPOS Competitive Bidding Program has been in a temporary gap period since January 1, 2024, which means there are no active contracts and any enrolled supplier can furnish equipment. It is coming back, though. CMS has finalized the next round to begin no later than January 1, 2028, focused on remote delivery categories including continuous glucose monitors and insulin pumps. Suppliers in those categories should treat the gap as a preparation window.
