Plus: CMS finds that insufficient documentation and medically unnecessary services are the top errors in 2010. You'll have 14 new tests that you'll be able to report as "CLIA-waived," thanks to a Nov. 5 CMS transmittal on the matter. According to MLN Matters article MM7184, CMS will now consider these tests CLIA-waived. You'll have to append modifier QW (CLIA-waived test) to these codes, which include the following, among others: To read the complete list of new CLIA-waived tests, visit www.cms.gov/MLNMattersArticles/downloads/MM7184.pdf.