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 0LNGX
Release Left Abdomen Tendon, External Approach
Release Left Abdomen Tendon, Open Approach
Release Left Abdomen Tendon, Perc Endo Approach
Release Left Abdomen Tendon, Percutaneous Approach