CLINICAL LABORATORY FEE SCHEDULE UPDATE

CMS is updating the status of two codes on the Clinical Laboratory Fee Schedule (CLFS). • Effective immediately, code G0431QW is deleted from the CLFS. Code G0431 describes a high complexity test, and should not be reported with a QW modifier; the QW modifier indicates a CLIA waived test. • Effective immediately, code G0434QW is added to the CLFS. Code G0434 can describe a CLIA waived test. The use of the QW modifier to indicate a CLIA waived test is necessary for accurate claims processing. Codes G0431 and G0434 will remain on the CLFS. Source: JSM/TDL 11194 dated March 1, 2011