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 0WJ3X
Inspection of Oral Cavity and Throat, External Approach
Inspection of Oral Cavity and Throat, Open Approach
Inspection of Oral Cavity and Throat, Perc Endo Approach
Inspection of Oral Cavity and Throat, Percutaneous Approach