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 09NN0
Release Nasopharynx, Percutaneous Endoscopic Approach
Release Nasopharynx, Via Natural or Artificial Opening
Release Nasopharynx, Percutaneous Approach
Release Nasopharynx, Open Approach
Release Nasopharynx, Endo