c7d596e6__II_CodesAAPC_News___AAPC_News__Long_description
[HCPCS] G0431 [Status] revised [Long description] 
Drug Screen single class, high complexity test, (e.g. immunoassay, enzyme assay), each specimen
CMS: Quarterly Update to HCPCS Level II CodesAAPC News - AAPC News
Long description