The Approach External is identified by letter "X" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0NJBX
Inspection of Nasal Bone, Percutaneous Endoscopic Approach
Inspection of Nasal Bone, Percutaneous Approach
Inspection of Nasal Bone, External Approach
Inspection of Nasal Bone, Open Approach