The Body Part Optic Nerve is identified by letter "G" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 00CG
Extirpation of Matter from Optic Nerve, Perc Approach
Extirpation of Matter from Optic Nerve, Open Approach
Extirpation of Matter from Optic Nerve, Perc Endo Approach