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 09NC0
Release Left Mastoid Sinus, Open Approach
Release Left Mastoid Sinus, Percutaneous Endoscopic Approach
Release Left Mastoid Sinus, Endo
Release Left Mastoid Sinus, Percutaneous Approach