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 01NM0
Release Abdominal Sympathetic Nerve, Open Approach
Release Abdominal Sympathetic Nerve, Perc Endo Approach
Release Abdominal Sympathetic Nerve, Percutaneous Approach