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 00CC0
Extirpation of Matter from Cerebellum, Open Approach
Extirpation of Matter from Cerebellum, Percutaneous Approach
Extirpation of Matter from Cerebellum, Perc Endo Approach