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 0SJ5X
Inspection of Sacrococcygeal Joint, External Approach
Inspection of Sacrococcygeal Joint, Open Approach
Inspection of Sacrococcygeal Joint, Perc Endo Approach
Inspection of Sacrococcygeal Joint, Percutaneous Approach