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 BT1CZ
Fluoroscopy of Ileal Diversion Loop using Other Contrast
Fluoroscopy of Ileal Diversion Loop
Fluoroscopy of Ileal Diversion Loop using L Osm Contrast
Fluoroscopy of Ileal Diversion Loop using H Osm Contrast