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 0KN4X
Release Tongue, Palate, Pharynx Muscle, Perc Approach
Release Tongue, Palate, Pharynx Muscle, External Approach
Release Tongue, Palate, Pharynx Muscle, Perc Endo Approach
Release Tongue, Palate, Pharynx Muscle, Open Approach