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 03N10
Release Left Internal Mammary Artery, Open Approach
Release Left Internal Mammary Artery, Perc Endo Approach
Release Left Internal Mammary Artery, Percutaneous Approach