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 0RJ5X
Inspection of C-thor Disc, Perc Endo Approach
Inspection of C-thor Disc, Extern Approach
Inspection of Cervicothoracic Vertebral Disc, Perc Approach
Inspection of Cervicothoracic Vertebral Disc, Open Approach