The Approach Open is identified by number "0" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 04NN0
Release Left Popliteal Artery, Percutaneous Approach
Release Left Popliteal Artery, Open Approach
Release Left Popliteal Artery, Perc Endo Approach