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 0SQ5X
Repair Sacrococcygeal Joint, External Approach
Repair Sacrococcygeal Joint, Open Approach
Repair Sacrococcygeal Joint, Perc Endo Approach
Repair Sacrococcygeal Joint, Percutaneous Approach