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 0LN7X
Release Right Hand Tendon, Open Approach
Release Right Hand Tendon, Percutaneous Endoscopic Approach
Release Right Hand Tendon, External Approach
Release Right Hand Tendon, Percutaneous Approach