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 0WC3X
Extirpate matter from Oral Cav & Throat, Perc Endo
Extirpate of Matter from Oral Cav & Throat, Extern Approach
Extirpation of Matter from Oral Cav & Throat, Perc Approach
Extirpation of Matter from Oral Cav & Throat, Open Approach