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 0WJ8X
Inspection of Chest Wall, Open Approach
Inspection of Chest Wall, External Approach
Inspection of Chest Wall, Percutaneous Endoscopic Approach
Inspection of Chest Wall, Percutaneous Approach