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 BT1GZ
Fluoroscopy Ileal Loop, Ureter, Kidney w H Osm Contrast
Fluoroscopy of Ileal Loop, Ureters and Kidneys
Fluoroscopy Ileal Loop, Ureter, Kidney w Oth Contrast
Fluoroscopy Ileal Loop, Ureter, Kidney w L Osm Contrast