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 0GW10
Revision of Drainage Device in Pineal Body, Extern Approach
Revision of Drainage Device in Pineal Body, Perc Approach
Revision of Drainage Device in Pineal Body, Open Approach
Revision of Drain Dev in Pineal Body, Perc Endo Approach