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 09NB0
Release Right Mastoid Sinus, Open Approach
Release Right Mastoid Sinus, Percutaneous Approach
Release Right Mastoid Sinus, Endo
Release Right Mastoid Sinus, Perc Endo Approach