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 01D40
Extraction of Ulnar Nerve, Percutaneous Approach
Extraction of Ulnar Nerve, Percutaneous Endoscopic Approach
Extraction of Ulnar Nerve, Open Approach