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 0WC40
Extirpation of Matter from Upper Jaw, Open Approach
Extirpation of Matter from Upper Jaw, Percutaneous Approach
Extirpation of Matter from Upper Jaw, Perc Endo Approach