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 01NN0
Release Lumbar Sympathetic Nerve, Percutaneous Approach
Release Lumbar Sympathetic Nerve, Perc Endo Approach
Release Lumbar Sympathetic Nerve, Open Approach