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 0N840
Division of Left Parietal Bone, Perc Endo Approach
Division of Left Parietal Bone, Percutaneous Approach
Division of Left Parietal Bone, Open Approach