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 0LNTX
Release Left Ankle Tendon, Percutaneous Endoscopic Approach
Release Left Ankle Tendon, Percutaneous Approach
Release Left Ankle Tendon, Open Approach
Release Left Ankle Tendon, External Approach