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 00NP0
Release Glossopharyngeal Nerve, Open Approach
Release Glossopharyngeal Nerve, Percutaneous Approach
Release Glossopharyngeal Nerve, Perc Endo Approach