Ask Dr. Z

I was hoping you could expand on two of the HCPCS modifiers that relate to Appropriate Use Criteria (AUC). 1) Modifier QQ - ordering professional consulted a qualified clinical decision support mechanism. Considering that there are more specific modifiers that will be available for CY 2020 (MA through MH), will this modifier have any relevance next year? 2) Modifier MG - the order for this service does not have appropriate use criteria in the clinical support mechanism consulted by the ordering professional. Can you explain when this modifier might be appropriate?