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 09C10
Extirpation of Matter from Left External Ear, Open Approach
Extirpation of Matter from Left External Ear, Perc Approach
Extirpation of Matter from L Ext Ear, Perc Endo Approach
Extirpation of Matter from L Ext Ear, Extern Approach