The Body Part Skull is identified by number "0" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0NJ0
Inspection of Skull, External Approach
Inspection of Skull, Percutaneous Approach
Inspection of Skull, Open Approach
Inspection of Skull, Percutaneous Endoscopic Approach