The Approach Open is identified by number "0" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 09C00
Extirpation of Matter from R Ext Ear, Extern Approach
Extirpation of Matter from Right External Ear, Open Approach
Extirpation of Matter from Right External Ear, Perc Approach
Extirpation of Matter from R Ext Ear, Perc Endo Approach