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 00C40
Extirpation of Matter from Cran Subdur Spc, Perc Approach
Extirpation of Matter from Cran Subdur Spc, Open Approach
Extirpate of Matter from Cran Subdur Spc, Perc Endo Approach