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 0KNSX
Release Right Lower Leg Muscle, Open Approach
Release Right Lower Leg Muscle, External Approach
Release Right Lower Leg Muscle, Percutaneous Approach
Release Right Lower Leg Muscle, Perc Endo Approach