Years ago, I learned about Durable Medical Equipment (DME) companies when my husband was diagnosed with sleep apnea and had to get a CPAP (Continuous Positive Airway Pressure) machine. I quickly learned that within our insurance policy, there was a little section on which medical devices were covered, when, why, how often, how much, and for which conditions. It was confusing to say the least. Fortunately, my husband went to our approved local DME shop, got fitted for his alien space helmet (have you seen one of these things?), and that was the end of that. Every year or so he would go get updated equipment, but really, there wasn't much to it.