DME Products, Equipment, and Modalities
Categories and classification
DME spans mobility (walkers, wheelchairs, scooters), respiratory (oxygen concentrators, CPAP, ventilators), beds and support surfaces, and therapeutic devices. Candidates must distinguish durable medical equipment from prosthetics, orthotics, and supplies, because the billing rules and coverage criteria differ. A trap: classifying a supply (e.g., diabetic test strips) as DME; supplies have their own benefit category and frequency limits.
Wheelchair and mobility selection
Know the difference between a standard manual wheelchair, a lightweight wheelchair, and a power mobility device. Power mobility requires a face-to-face examination, a mobility evaluation, and documentation that the patient cannot use a manual device. Questions often test the "7-element order" concept for power wheelchairs-item description, features, and justification must all be present. A common trap is assuming a scooter is interchangeable with a power wheelchair; coverage criteria and documentation differ.
Respiratory equipment
Oxygen therapy requires a qualifying blood gas or pulse oximetry result, and the supplier must document the need for a portable system if one is furnished. CPAP requires a sleep study confirming obstructive sleep apnea and a compliant usage record (often four hours per night over a defined period) for continued coverage. Traps include billing CPAP without a compliance download or furnishing oxygen without a qualifying test.
Support surfaces and beds
Distinguish a group 1 support surface from group 2 and 3, which require progressively stricter documentation of pressure ulcers and failed conservative treatment. A hospital bed requires a medical need for positioning or height adjustment.
Rule of thumb
Match the HCPCS code to the exact product description, then confirm the coverage criteria for that code before delivery. If the product has a feature not justified in the order, do not bill the upgraded code.