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 0XJ9X
Inspection of Left Upper Arm, Percutaneous Approach
Inspection of Left Upper Arm, Perc Endo Approach
Inspection of Left Upper Arm, External Approach
Inspection of Left Upper Arm, Open Approach