The Device No Device 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 03NN0Z
Release Left External Carotid Artery, Open Approach
Release Left External Carotid Artery, Perc Endo Approach
Release Left External Carotid Artery, Percutaneous Approach