The Approach Open is identified by number "0" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 01C40
Extirpation of Matter from Ulnar Nerve, Perc Endo Approach
Extirpation of Matter from Ulnar Nerve, Open Approach
Extirpation of Matter from Ulnar Nerve, Perc Approach