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 B207YZ
Plain Radiography of R Int Mamm Graft using Oth Contrast
Plain Radiography of R Int Mamm Graft using L Osm Contrast
Plain Radiography of R Int Mamm Graft using H Osm Contrast