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 0RN6X
Release Thoracic Vertebral Joint, Open Approach
Release Thoracic Vertebral Joint, External Approach
Release Thoracic Vertebral Joint, Perc Endo Approach
Release Thoracic Vertebral Joint, Percutaneous Approach