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 0SN2X
Release Lumbar Vertebral Disc, Percutaneous Approach
Release Lumbar Vertebral Disc, External Approach
Release Lumbar Vertebral Disc, Open Approach
Release Lumbar Vertebral Disc, Perc Endo Approach