Having your Durable Medical Equipment (DME) denied by insurance is frustrating, but you have legal rights and a strong path to overturn the denial. Approximately 40-60% of insurance denials are overturned on appeal when patients submit comprehensive documentation and cite applicable laws. This guide walks you through exactly why durable medical equipment claims get denied, what medical necessity criteria major insurers apply, and how to build the strongest possible appeal.
Important Disclaimer
This guide is for informational purposes only and does not constitute legal or medical advice. Insurance coverage rules vary by plan type, state, and individual circumstances. Consult with a patient advocate, healthcare attorney, or your state Department of Insurance for advice specific to your situation. Information current as of 2026-03-28.
Why Durable Medical Equipment Gets Denied by Insurance
Durable Medical Equipment denials typically fall into specific, predictable patterns. Understanding the exact reason for your denial is the first step to building an effective appeal. The most common denial reasons for Durable Medical Equipment (DME) include:
- Reason 1: Equipment is not on the insurer's approved DME list or not from an approved supplier
- Reason 2: The specific equipment model or brand is not the insurer's preferred option
- Reason 3: Medical necessity documentation does not justify the equipment for the patient's condition
- Reason 4: The equipment is considered convenience rather than medical necessity
- Reason 5: Rental versus purchase dispute — insurer will only rent when purchase is requested
Your Explanation of Benefits (EOB) or denial letter should include a specific reason code. Match that code to the reasons above to target your appeal effectively. If the denial letter is vague, you have the legal right to request the specific clinical criteria used to evaluate your claim.
Common Denial Codes for Durable Medical Equipment
Insurance companies use standardized codes to explain denials. Here are the codes most frequently associated with durable medical equipment denials:
| Denial Code | What It Means |
|---|---|
| CO-50 | Not medically necessary |
| CO-96 | Non-covered charge |
| CO-27 | Equipment not on approved list |
| CO-119 | Benefit maximum for DME reached |
| CO-242 | Supplier not in network |
Understanding your specific denial code helps you tailor your appeal to address the exact basis for denial rather than making generic arguments. Request your complete claims file if the denial codes are not clear from your EOB. Use our EOB Decoder tool to understand your denial documentation.
Medical Necessity Criteria for Durable Medical Equipment
DME coverage requires that the equipment serves a medical purpose, is durable (reusable over time), is appropriate for home use, and is prescribed by a physician. Common DME includes wheelchairs, hospital beds, oxygen equipment, walkers, and blood glucose monitors. Medicare requires DME to be ordered by a physician, meet the specific coverage criteria for each item, and be supplied by a Medicare-enrolled supplier. Commercial insurers follow similar requirements but may use different approved equipment lists. Power wheelchairs and complex DME require detailed face-to-face evaluations and comprehensive documentation. The specific model or brand requested may be denied in favor of a less expensive equivalent.
Key Takeaway
Each insurer applies different medical necessity criteria for durable medical equipment. Request your specific insurer's medical policy for this procedure. The criteria they use must be disclosed to you upon request, and your appeal should address each criterion point by point.
Step-by-Step Appeal Process for Durable Medical Equipment
Step 1: Request the Complete Written Denial
Contact your insurer and request the full written denial including the specific clinical criteria used, the reviewer's credentials, and your appeal rights and deadlines. Under ACA Section 2719, you are entitled to this information. Keep a log of every communication with your insurer — dates, names, reference numbers.
Step 2: Obtain Your Complete Medical Records
Request all records relevant to your durable medical equipment claim from every provider involved. Under HIPAA, you are entitled to your complete medical records. Focus on documentation that directly addresses the denial reason.
Step 3: Get a Letter of Medical Necessity from Your Provider
Ask your treating physician to write a detailed letter explaining exactly why Durable Medical Equipment (DME) is medically necessary for your specific condition. The letter should reference the insurer's specific medical policy criteria and address each requirement. A generic letter is far less effective than one that directly responds to the denial reason.
Step 4: Gather Supporting Clinical Evidence
Collect clinical practice guidelines from relevant medical societies, peer-reviewed research supporting the procedure for your diagnosis, and any applicable insurer-specific policy bulletins. Evidence from the same clinical guidelines the insurer references is particularly powerful.
Step 5: Write and Submit Your Appeal
Your appeal should cite specific laws (ACA Section 2719, ERISA Section 503 if applicable, and relevant state laws), address the exact denial reason with point-by-point rebuttal, include all supporting documentation, and request a specific outcome (approval of the denied service). Submit by certified mail or through the insurer's online portal with delivery confirmation.
Step 6: If Denied, Escalate to External Review
If your internal appeal is denied, you have the right to an external review by an Independent Review Organization (IRO) under the ACA. The external reviewer is independent of the insurer and makes a binding determination. External review must be requested within 4 months of the internal appeal denial in most states. For urgent situations, expedited external review must be decided within 72 hours.
Sample Appeal Letter Language for Durable Medical Equipment
Sample Appeal Excerpt
I appeal the denial of [specific DME item], claim [X]. The patient's medical condition — [diagnosis] — requires this equipment because [specific functional need]. The prescribing physician has determined that [item] is medically necessary based on a face-to-face evaluation on [date]. The equipment meets the definition of DME: it is durable, used for a medical purpose, appropriate for home use, and ordered by a physician. [If specific model disputed: The specific model requested is necessary because standard alternatives are inadequate due to (patient's size, weight capacity needs, specific functional requirements). The treating physician and rehabilitation technology specialist have evaluated less expensive alternatives and determined they are clinically inappropriate.]
Customize this language with your specific details — claim numbers, dates, provider names, and clinical findings. A personalized appeal that addresses the specific denial reason is significantly more effective than a generic template. Use our free appeal letter generator to build a complete letter.
Supporting Documentation to Strengthen Your Appeal
For durable medical equipment appeals, gather the following documentation before submitting:
- Physician's prescription and letter of medical necessity
- Face-to-face evaluation documentation
- Functional assessment documenting the need for the equipment
- Documentation of why less expensive alternatives are clinically inadequate
- Assistive technology evaluation (for wheelchairs and complex equipment)
- Medicare-enrolled supplier documentation if applicable
Organize your documentation clearly with a cover page listing all enclosed items. Number each exhibit and reference them specifically in your appeal letter. Incomplete or disorganized submissions are easier for insurers to deny.
Success Rate and Tips for Durable Medical Equipment Appeals
While specific success rates vary by insurer and clinical scenario, data from state insurance regulators suggests that 40-60% of medical necessity denials are overturned when patients pursue a comprehensive appeal. For durable medical equipment specifically, the following strategies may improve your chances:
- Ensure the DME supplier is enrolled with Medicare or in your insurer's network
- For power wheelchairs, a face-to-face evaluation and detailed mobility assessment are essential
- If the specific model is disputed, document why standard alternatives do not meet the patient's needs
- For upgrade requests, clearly separate the medically necessary from the convenience features
The single most important factor in appeal success is the quality and specificity of your documentation. Generic appeals fail. Appeals that address the exact denial reason with targeted clinical evidence succeed at much higher rates.
Check your appeal deadline to ensure you file within the required timeframe. Missing the deadline may forfeit your appeal rights entirely.
Frequently Asked Questions
What is considered durable medical equipment?
DME is equipment that serves a medical purpose, can withstand repeated use, is appropriate for use in the home, and is generally not useful to a person who is not ill or injured. Common DME includes wheelchairs, walkers, hospital beds, oxygen equipment, CPAP machines, blood glucose monitors, nebulizers, and prosthetic devices. Items that are purely for convenience or comfort (such as bath lifts in some cases) may not meet the DME definition for coverage purposes.
Does insurance cover electric wheelchairs?
Power wheelchairs are covered when medically necessary — typically when the patient cannot independently propel a manual wheelchair and the power wheelchair is needed for mobility within the home. Medicare requires a comprehensive face-to-face mobility evaluation by a physician, an assistive technology evaluation, and documentation that the patient's mobility limitations cannot be resolved with a manual wheelchair, scooter, or other less expensive alternative. The documentation requirements for power wheelchairs are among the most stringent for any DME item.
Can I choose the DME brand I want?
Insurers typically cover the least expensive clinically appropriate option. If you want a specific brand or model, you need medical documentation explaining why the preferred alternative is clinically inadequate for your specific needs — different weight capacity, specific cushion requirements for pressure sore prevention, specialized controls needed due to the patient's physical limitations. Without clinical justification, you may be responsible for the cost difference.
What if my DME needs repair or replacement?
Most insurers cover DME repair when it is less expensive than replacement and the equipment is still needed. Replacement is covered when the equipment is beyond repair, the patient's medical condition has changed requiring different equipment, or the equipment has exceeded its expected life span. Keep maintenance records and document equipment failures. For rented equipment, the supplier is typically responsible for maintenance and repair during the rental period.
Does Medicare cover DME?
Medicare Part B covers DME when prescribed by a physician, medically necessary, and supplied by a Medicare-enrolled supplier. The patient typically pays 20% of the Medicare-approved amount after meeting the Part B deductible. Some DME items are rented (CPAP, hospital beds) while others are purchased (walkers, blood glucose monitors). Medicare requires a valid physician order, documentation of medical necessity, and an enrolled supplier. The specific documentation requirements vary by equipment type and are detailed in the Medicare Coverage Database.
Sources: ACA Section 2719 · ERISA Section 503 · No Surprises Act · CMS regulations · State insurance codes · Clinical practice guidelines. Disclaimer: This article is for informational purposes only. Coverage rules vary by plan type and state. Consult a patient advocate or healthcare attorney for advice specific to your situation. Last updated: 2026-03-28.