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 09NP0
Release Accessory Sinus, Percutaneous Endoscopic Approach
Release Accessory Sinus, Open Approach
Release Accessory Sinus, Endo
Release Accessory Sinus, Percutaneous Approach