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 0RN1X
Release Cervical Vertebral Joint, Perc Endo Approach
Release Cervical Vertebral Joint, External Approach
Release Cervical Vertebral Joint, Percutaneous Approach
Release Cervical Vertebral Joint, Open Approach