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 0NQGX
Repair Left Ethmoid Bone, Percutaneous Endoscopic Approach
Repair Left Ethmoid Bone, Open Approach
Repair Left Ethmoid Bone, External Approach
Repair Left Ethmoid Bone, Percutaneous Approach