The Body Part Accessory Sinus is identified by letter "P" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 09NP
Release Accessory Sinus, Endo
Release Accessory Sinus, Percutaneous Approach
Release Accessory Sinus, Open Approach
Release Accessory Sinus, Percutaneous Endoscopic Approach