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 0PNS0
Release Left Thumb Phalanx, Percutaneous Endoscopic Approach
Release Left Thumb Phalanx, Percutaneous Approach
Release Left Thumb Phalanx, Open Approach