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 B54PZ
Ultrasonography of Bi Up Extrem Vein, Intravasc
Ultrasonography of Bilateral Upper Extremity Veins, Guidance
Ultrasonography of Bilateral Upper Extremity Veins