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 0LNSX
Release Right Ankle Tendon, Percutaneous Endoscopic Approach
Release Right Ankle Tendon, External Approach
Release Right Ankle Tendon, Open Approach
Release Right Ankle Tendon, Percutaneous Approach