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 B31MZ
Fluoroscopy of Spinal Arteries using High Osmolar Contrast
Fluoroscopy Spinal Art w L Osm Contrast, Laser Intraop
Fluoroscopy of Spinal Arteries
Fluoroscopy of Spinal Art using Oth Contrast, Laser Intraop
Fluoroscopy Spinal Art w H Osm Contrast, Laser Intraop
Fluoroscopy of Spinal Arteries using Other Contrast
Fluoroscopy of Spinal Arteries using Low Osmolar Contrast