The Body Part External Auditory Canal, Left is identified by number "4" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 09C4
Extirpate of Matter from L Ext Auditory Canal, Perc Approach
Extirpate of Matter from L Ext Auditory Canal, Open Approach
Extirpation of Matter from L Ext Auditory Canal, Via Opening
Extirpate matter from L Ext Auditory Canal, Extern
Extirpate matter from L Ext Auditory Canal, Perc Endo
Extirpation of Matter from L Ext Auditory Canal, Endo