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 BR05Z
Plain Radiography of Thoracic Facet Jt using Oth Contrast
Plain Radiography of Thoracic Facet Joint(s)
Plain Radiography of Thoracic Facet Jt using H Osm Contrast
Plain Radiography of Thoracic Facet Jt using L Osm Contrast