The Contrast Low Osmolar is identified by number "1" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to B4091
Plain Radiography of Lumbar Arteries using Other Contrast
Plain Radiography of Lumbar Arteries using H Osm Contrast
Plain Radiography of Lumbar Arteries using L Osm Contrast