What would a primary DX code be? Would you go with the reason for the barium swallow if there is no complications from the aspiration? We been having denials for the use of a asphyxiation T code. Would an asphyxiation code apply for aspiration found during the study? I could not index aspiration and medical necessity requires a secondary code. Would the Y84.4 only apply if the T code was used like an asphyxia? As the Y84.4 could not be billed alone as a primary right?