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 0SN5X
Release Sacrococcygeal Joint, Percutaneous Approach
Release Sacrococcygeal Joint, Open Approach
Release Sacrococcygeal Joint, External Approach
Release Sacrococcygeal Joint, Perc Endo Approach