The Qualifier None is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to BN201Z
Computerized Tomography (CT Scan) of Skull
CT Scan of Skull using L Osm Contrast
CT Scan of Skull using Oth Contrast
CT Scan of Skull using H Osm Contrast