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 0RN3X
Release Cervical Vertebral Disc, Open Approach
Release Cervical Vertebral Disc, External Approach
Release Cervical Vertebral Disc, Percutaneous Approach
Release Cervical Vertebral Disc, Perc Endo Approach