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 0SN0X
Release Lumbar Vertebral Joint, External Approach
Release Lumbar Vertebral Joint, Perc Endo Approach
Release Lumbar Vertebral Joint, Percutaneous Approach
Release Lumbar Vertebral Joint, Open Approach