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 09N00
Release Right External Ear, Open Approach
Release Right External Ear, Percutaneous Approach
Release Right External Ear, Percutaneous Endoscopic Approach
Release Right External Ear, External Approach