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 09C0X
Extirpation of Matter from R Ext Ear, Extern Approach
Extirpation of Matter from Right External Ear, Perc Approach
Extirpation of Matter from R Ext Ear, Perc Endo Approach
Extirpation of Matter from Right External Ear, Open Approach