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 00C10
Extirpation of Matter from Cerebral Meninges, Open Approach
Extirpation of Matter from Cerebral Meninges, Perc Approach
Extirpate of Matter from Cereb Meninges, Perc Endo Approach