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 0SQ6X
Repair Coccygeal Joint, External Approach
Repair Coccygeal Joint, Open Approach
Repair Coccygeal Joint, Percutaneous Endoscopic Approach
Repair Coccygeal Joint, Percutaneous Approach