The Contrast None is identified by letter "Z" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to BW1CZ
Fluoroscopy of Lower Extremity using Low Osmolar Contrast
Fluoroscopy of Lower Extremity using Other Contrast
Fluoroscopy of Lower Extremity
Fluoroscopy of Lower Extremity using High Osmolar Contrast