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 09CN0
Extirpation of Matter from Nasopharynx, Perc Approach
Extirpation of Matter from Nasopharynx, Perc Endo Approach
Extirpation of Matter from Nasopharynx, Open Approach
Extirpation of Matter from Nasopharynx, Endo
Extirpation of Matter from Nasopharynx, Via Opening