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 B31TZ
Fluoroscopy L Pulm Art w H Osm Contrast, Laser Intraop
Fluoroscopy L Pulm Art w L Osm Contrast, Laser Intraop
Fluoroscopy of Left Pulmonary Artery
Fluoroscopy of Left Pulmonary Artery using H Osm Contrast
Fluoroscopy of Left Pulmonary Artery using Other Contrast
Fluoroscopy of Left Pulmonary Artery using L Osm Contrast
Fluoroscopy of L Pulm Art using Oth Contrast, Laser Intraop