The Body Part Mastoid Sinus, Left is identified by letter "C" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 09CC
Extirpation of Matter from Left Mastoid Sinus, Perc Approach
Extirpation of Matter from Left Mastoid Sinus, Open Approach
Extirpation of Matter from Left Mastoid Sinus, Endo
Extirpate of Matter from L Mastoid Sinus, Perc Endo Approach