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 0CNWX
Release Upper Tooth, Multiple, External Approach
Release Upper Tooth, Single, Open Approach
Release Upper Tooth, Multiple, Open Approach
Release Upper Tooth, All, Open Approach
Release Upper Tooth, All, External Approach
Release Upper Tooth, Single, External Approach