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 B31NZ
Fluoroscopy of Other Upper Arteries using H Osm Contrast
Fluoroscopy of Other Upper Arteries
Fluoroscopy Oth Up Art w H Osm Contrast, Laser Intraop
Fluoroscopy of Oth Up Art using Oth Contrast, Laser Intraop
Fluoroscopy of Other Upper Arteries using Other Contrast
Fluoroscopy of Other Upper Arteries using L Osm Contrast
Fluoroscopy Oth Up Art w L Osm Contrast, Laser Intraop