Your help is greatly appreciated. I suspect you are correct regarding the DME provider. I will follow up with them to see how the claim was filed. The document you linked is helpful. Thanks again.

I have been using CPAP therapy for over 5 years now. Last week my physician wrote a prescription for a new machine after I reported increased noise and a faulty humidifier. My DME provider filed a claim with Medicare which was denied as their records indicated my CPAP utilization was 9 months short ...