The Approach External is identified by letter "X" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0RNPX
Release Left Wrist Joint, Percutaneous Approach
Release Left Wrist Joint, Percutaneous Endoscopic Approach
Release Left Wrist Joint, Open Approach
Release Left Wrist Joint, External Approach