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 0KNRX
Release Left Upper Leg Muscle, Perc Endo Approach
Release Left Upper Leg Muscle, External Approach
Release Left Upper Leg Muscle, Percutaneous Approach
Release Left Upper Leg Muscle, Open Approach