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 0CC50
Extirpation of Matter from Upper Gingiva, Perc Approach
Extirpation of Matter from Upper Gingiva, External Approach
Extirpation of Matter from Upper Gingiva, Open Approach