According to a recent OIG report, "Most Medicare claims that DME suppliers submitted for replacement PAP device supplies did not comply with Medicare requirements. Of the 110 claims in our sample, 24 complied with Medicare requirements; however, 86 claims with payments totaling $13,414 did not. On the basis of our sample results, we estimated that Medicare made overpayments of almost $631.3 million for replacement PAP device supply claims that did not meet Medicare requirements."