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 0LN6X
Release Left Lower Arm and Wrist Tendon, Open Approach
Release Left Lower Arm and Wrist Tendon, External Approach
Release Left Lower Arm and Wrist Tendon, Perc Approach
Release Left Lower Arm and Wrist Tendon, Perc Endo Approach