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 0CCWX
Extirpation of Matter from Upper Tooth, All, Extern Approach
Extirpation of Matter from Upper Tooth, Mult, Open Approach
Extirpation of Matter from Upper Tooth, All, Open Approach
Extirpation of Matter from Up Tooth, Sing, Extern Approach
Extirpation of Matter from Upper Tooth, Sing, Open Approach
Extirpation of Matter from Up Tooth, Mult, Extern Approach