The Device No Device is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 01NK4Z
Release Head and Neck Sympathetic Nerve, Perc Approach
Release Head and Neck Sympathetic Nerve, Open Approach
Release Head and Neck Sympathetic Nerve, Perc Endo Approach