WASHINGTON, D.C. (May 12, 2020)—Last week, the DME MACs announced that the certificate of medical necessity (CMN) for oxygen claims will not be required during the public health emergency. This is due to the CMS interim final rule published on April 6 (CMS-1744-IFC) that waived the clinical indication requirements for respiratory NCDs and LCDs. In the new announcement, the DME MACs clarified that the same exemption will apply to external infusion pumps.