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 BR27Z
CT Scan of Thoracic Spine using Oth Contrast
Computerized Tomography (CT Scan) of Thoracic Spine
CT Scan of Thoracic Spine using H Osm Contrast
CT Scan of Thoracic Spine using L Osm Contrast