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 0C5WX
Destruction of Upper Tooth, Single, Open Approach
Destruction of Upper Tooth, Multiple, Open Approach
Destruction of Upper Tooth, All, External Approach
Destruction of Upper Tooth, Multiple, External Approach
Destruction of Upper Tooth, All, Open Approach
Destruction of Upper Tooth, Single, External Approach