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 01CL0
Extirpation of Matter from Thor Symp Nrv, Open Approach
Extirpation of Matter from Thor Symp Nrv, Perc Approach
Extirpation of Matter from Thor Symp Nrv, Perc Endo Approach