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 00DG
Extraction of Optic Nerve, Open Approach
Extraction of Optic Nerve, Percutaneous Endoscopic Approach
Extraction of Optic Nerve, Percutaneous Approach