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 00Q20
Repair Dura Mater, Percutaneous Endoscopic Approach
Repair Dura Mater, Percutaneous Approach
Repair Dura Mater, Open Approach