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 0WJ5X
Inspection of Lower Jaw, Percutaneous Endoscopic Approach
Inspection of Lower Jaw, Open Approach
Inspection of Lower Jaw, Percutaneous Approach
Inspection of Lower Jaw, External Approach