Glossary · Clinical

Durable medical equipment (DME)

Durable medical equipment (DME) is any item that can withstand repeated use, serves a medical purpose, is generally useless to a healthy person, and is appropriate for home use—expected to last at least three years. In orthopedics, common examples include knee braces, crutches, walkers, power wheelchairs, and osteogenesis stimulators.

Verified May 8, 2026 · 8 sources ↓

Drawn from CMSMedicare.govAAPCMedicareadvocacy42 CFR

Definition

Source · Editorial summary grounded in 8 cited references ↓

Under 42 CFR § 414.202, an item qualifies as DME only when it meets all four criteria simultaneously: (1) it can withstand repeated use; (2) it is primarily and customarily used to serve a medical purpose; (3) it is generally not useful to someone who is not sick or injured; and (4) it is appropriate for use in the home—where 'home' explicitly excludes hospitals and skilled nursing facilities. Medicare further expects qualifying items to last at least three years. When prosthetics, orthotics, and supplies are bundled with DME, the combined category is referred to as DMEPOS.

For orthopedic practices, DMEPOS spans a wide clinical range: rigid and soft knee orthoses, ankle-foot orthoses (AFOs), lumbar-sacral orthoses (LSOs), bone-growth stimulators, power mobility devices (PMDs), crutches, walkers, and therapeutic footwear for diabetic patients. Each item is billed by Medicare-enrolled DMEPOS suppliers using HCPCS Level II codes (alpha-numeric, e.g., L-codes for orthoses, E-codes for equipment) and is adjudicated by one of four regional DME Medicare Administrative Contractors (DME MACs), not the Part B MAC that handles physician services.

Ordering physicians play a critical upstream role: they must document medical necessity, generate a compliant written order, and—for items on CMS's Required Face-to-Face Encounter and Written Order Prior to Delivery List (83 items as of April 2026, including specific orthoses, PMDs, hospital beds, and osteogenesis stimulators)—conduct and document a qualifying face-to-face encounter before the supplier can deliver the item. Failure at any of these steps can block the supplier's claim, trigger a retrospective denial, and create downstream liability for the ordering clinician.

Why it matters

Incomplete or missing documentation from the ordering orthopedic surgeon is the single most common reason DME claims are denied or recouped on audit. If a patient's chart lacks a signed written order, a valid Certificate of Medical Necessity (CMN), or a documented face-to-face encounter for items that require one—such as power wheelchairs or certain orthoses—the DME MAC will deny the supplier's claim and may refer the ordering provider for overpayment review. Because the ordering surgeon does not bill for DME directly (the enrolled supplier does), denials may not surface until an audit, at which point the practitioner's records become the evidentiary record for medical necessity. Getting the documentation right at the point of order protects the patient's access to the device, the supplier's revenue, and the surgeon's compliance standing.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Signing a DME order without documenting the clinical rationale—diagnosis, functional limitation, and why the specific item is medically necessary—leaving the chart unable to support medical necessity on audit.
Ordering a power mobility device or a listed orthosis (e.g., LSO, knee orthosis) without conducting and documenting the required face-to-face encounter before delivery, which CMS has enforced since the 2022 Federal Register Notice.
Assuming the surgeon's MAC processes the DME claim—orthopedic physician claims go to the Part B MAC while DMEPOS supplier claims go to the regional DME MAC; mixing up contractor contacts delays appeals and prior-authorization requests.
Using the wrong HCPCS code for an orthosis because the L-code was selected from a charge-master rather than confirmed through the PDAC (Pricing, Data Analysis and Coding) contractor, resulting in a code-to-product mismatch and claim denial.
Omitting required bilateral/laterality modifiers (e.g., RT, LT) on claims for paired devices such as AFOs or knee orthoses, causing automatic claim rejection under NCCI edits.
Failing to append modifier RA (replacement of a DME item) or RB (replacement of a part) when a device is reissued after loss, damage, or wear, leading to a duplicate-item denial.
Treating all post-surgical braces as DME without confirming home-use eligibility—items dispensed exclusively in a hospital outpatient setting may be billed differently and may not meet the 'appropriate for use in the home' criterion.

Related codes

Codes commonly involved when this concept appears in practice.

Modifiers

LT Left side RT Right side KX Medical-policy requirements met

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01Does the orthopedic surgeon submit the DME claim to Medicare?

No. The Medicare-enrolled DMEPOS supplier submits the claim to the appropriate DME MAC. The surgeon's role is to provide a compliant written order and, where required, a documented face-to-face encounter. Physician-furnished items like casts and splints applied in-office are billed differently, through the Part B MAC.

02Which orthopedic items currently require a face-to-face encounter before delivery?

As of April 2026, CMS's list includes all 46 power mobility device codes, osteogenesis stimulators, specific lumbar-sacral and knee orthoses, hospital beds, and oxygen delivery systems—83 codes in total. The list has grown through four Federal Register Notices (2022, 2023, 2024, 2026). Surgeons should verify current status via the CMS DMEPOS Order Requirements page before signing orders for high-cost orthoses or stimulators.

03What HCPCS codes are used for DME billing and how are they classified?

DME is reported with HCPCS Level II codes—an alpha-numeric format beginning with a letter (E-codes for general equipment, L-codes for orthoses and prosthetics, A-codes for supplies, K-codes for items lacking a permanent code). CMS's BETOS classification further groups DME into subcategories D1A through D1G. Orthotics and prosthetics carry BETOS code D1F. The PDAC contractor assigns and confirms the correct code for specific products.

04What is a Certificate of Medical Necessity (CMN) and when is it required for orthopedic DME?

A CMN is a standardized CMS form completed by the ordering practitioner that attests to a patient's medical need for specific high-cost DME items such as power wheelchairs, seat-lift mechanisms, pneumatic compression devices, and certain hospital beds. Not every DME item requires a CMN—many orthoses are supported by a detailed written order plus chart documentation—but when a CMN is required, it must be signed before the supplier delivers the item or the claim will be denied.

05How does Medicare Part B cover DME, and what does the patient pay?

Medicare Part B covers 80% of the Medicare-approved amount for DME after the annual Part B deductible is met. The patient or secondary insurer is responsible for the remaining 20% coinsurance. In Medicare Advantage plans, cost-sharing varies by plan but coverage cannot be less than traditional Medicare. For items subject to competitive bidding, the approved amount is set by the winning bid in the patient's geographic area.

06Can a DME item dispensed in a hospital outpatient department qualify for DME billing?

Generally no. Medicare's DME definition requires the item to be appropriate for use in the home, and 'home' explicitly excludes hospitals and skilled nursing facilities. Items dispensed exclusively during an inpatient or hospital outpatient stay—like a postoperative immobilizer applied in the OR—are typically bundled into the facility payment rather than billed separately as DME.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

When Mira detects that a clinician is ordering or documenting a DME item, it should prompt for the following elements required for a compliant order and defensible medical-necessity record: 1. DIAGNOSIS & FUNCTIONAL LIMITATION: Capture the ICD-10-CM code and a plain-language description of the functional deficit (e.g., 'inability to ambulate without assistive device secondary to right knee instability post-ACL reconstruction'). 2. SPECIFIC ITEM & HCPCS CODE: Confirm the HCPCS Level II code with the supplier or via the PDAC helpline before finalizing the order; flag L-code vs. E-code as appropriate. 3. FACE-TO-FACE ENCOUNTER: If the ordered item appears on the CMS Required Face-to-Face Encounter and Written Order Prior to Delivery List (PMDs, certain orthoses, osteogenesis stimulators, hospital beds, oxygen systems), ensure the encounter is documented in today's note with findings that support the order. 4. LATERALITY MODIFIER: Prompt for RT/LT when the item is a unilateral device (AFO, knee orthosis, prosthesis). 5. REPLACEMENT FLAG: If this is a replacement item, note RA or RB and document the reason (loss, irreparable damage, patient weight change >15 lb for a custom device, etc.). 6. WRITTEN ORDER ELEMENTS: The order must include patient name, date of order, item description or HCPCS code, quantity, treating practitioner name and NPI, and signature with date. Mira should auto-populate available fields and flag any that are blank before the order is finalized.

See Mira's approach

Related terms

HCPCS Level II Coding

HCPCS Level II is the CMS-maintained alphanumeric code set used to bill products, supplies, and services—such as DME, orthotics, prosthetics, and injectable drugs—that CPT codes do not adequately describe. Each code consists of one letter (A–V) followed by four digits.

Prior authorization Billing

Prior authorization (PA) is a payer requirement that a provider obtain approval before delivering a specific service, procedure, or item—otherwise the claim will be denied regardless of medical necessity. Approval is granted when submitted clinical documentation meets the payer's coverage criteria.

Local Coverage Determination (LCD) Compliance

A Local Coverage Determination (LCD) is a regional Medicare policy issued by a Medicare Administrative Contractor (MAC) that defines when a specific service, procedure, or supply is considered reasonable and medically necessary within that contractor's jurisdiction.