This new MLN product explains how to look up Medicare code pair edits and Medically Unlikely Edits (MUEs). NCCI tools can help providers avoid coding and billing errors and subsequent payment denials. If you want to become familiar with the "National Correct Coding Initiative Policy Manual for Medicare Services" and the tools on the NCCI website, this is your best resource! Go to http://www.cms.gov/MLNProducts/MPUB/list.asp and enter ‘How to’ to find this and other MLN ‘How to’ series publications.