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 0JN00
Release Scalp Subcu/Fascia, Extern Approach
Release Scalp Subcutaneous Tissue and Fascia, Open Approach
Release Scalp Subcutaneous Tissue and Fascia, Perc Approach