What are the four requirements for an AFO to be covered through Medicare for non-ambulation?

The four requirements for an AFO (Ankle-Foot Orthosis) to be covered by Medicare for non-ambulation focus on specific clinical conditions and treatment expectations that justify the need for the orthotic device.

Having a plantar flexion (PF) contracture of at least 10 degrees indicates a significant limitation in ankle range of motion, which can impede a patient's ability to perform daily activities. The expectation to correct this contracture signifies a proactive approach to treatment, where improvement in the patient's condition is anticipated through the use of the AFO. Additionally, interference with functional abilities highlights the necessity of the orthosis in enabling or enhancing the patient's capacity to perform essential tasks, even in non-ambulation scenarios. Finally, using the AFO in conjunction with a stretching therapy program underscores the role of the device as part of a comprehensive treatment plan aimed at improving the patient’s condition over time.

The other options focus on various features and designs of the AFO that may not directly pertain to Medicare's coverage criteria for non-ambulation cases. While they discuss aspects such as the orthosis's physical characteristics or fit, they do not address the clinical justification needed for coverage in cases where ambulation is not the primary goal.