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 BU18Z
Fluoroscopy of Uterus & Fallopian using H Osm Contrast
Fluoroscopy of Uterus & Fallopian using L Osm Contrast
Fluoroscopy of Uterus and Fallopian Tubes
Fluoroscopy of Uterus and Fallopian Tubes using Oth Contrast