Yes you are correct! We should use CLIA# for the procedure codes G0434, G0431 & 80101, 80104. Otherwise it will get denied for "Claim/service lacks information which is needed for adjudication"
Also remember the following rule:
Multiple Drug class method = We should bill the procedure code 80101-ALTERNATE CODE FOR MEDICARE(G0431 Drug screen, qualitative; multiple drug classes by high complexity test method (e.g., immunoassay, enzyme assay), per patient encounter)
Single Drug class method = We should bill the procedure code 80104-ALTERNATE CODE FOR MEDICARE G0434 Drug screen, other than chromatographic; any number of drug classes, by CLIA waived test or moderate complexity test, per patient encounter