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 0FJ0X
Inspection of Liver, External Approach
Inspection of Liver, Percutaneous Approach
Inspection of Liver, Open Approach
Inspection of Liver, Percutaneous Endoscopic Approach