The Qualifier None is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to BQ18ZZ
Fluoroscopy of Left Knee
Fluoroscopy of Left Knee using High Osmolar Contrast
Fluoroscopy of Left Knee using Low Osmolar Contrast
Fluoroscopy of Left Knee using Other Contrast