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 BR06Z
Plain Radiography of Lumbar Facet Joint(s)
Plain Radiography of Lumbar Facet Jt using Oth Contrast
Plain Radiography of Lumbar Facet Jt using H Osm Contrast
Plain Radiography of Lumbar Facet Jt using L Osm Contrast