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 BW29Z
CT Scan of Head & Neck using Oth Contrast, Unenh, Enhance
CT Scan of Head & Neck using L Osm Contrast, Unenh, Enhance
CT Scan of Head & Neck using H Osm Contrast
CT Scan of Head & Neck using H Osm Contrast, Unenh, Enhance
CT Scan of Head & Neck using L Osm Contrast
Computerized Tomography (CT Scan) of Head and Neck
CT Scan of Head & Neck using Oth Contrast