CMS has released most of its “Medically Unlikely Edits” (MUE), which are used by Medicare contractors when processing claims to ensure that providers and suppliers do not report excessive services.   An MUE for a HCPCS/CPT code is the maximum units of service under most circumstances that a provider would report for a code for a single beneficiary on a single date of service; claims with more than the MUE edit amount will be denied (unless a modifier is used to used to report medically necessary units of service in excess of an MUE value).   The MUE currently contains edits for about 9,700 HCPCS/CPT codes, although CMS is not publishing all active MUEs since it could diminish the effectiveness of MUE edits that are designed to detect and deter questionable payments rather than billing errors. CMS will update the list quarterly.