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 09TG0
Resection of Left Eustachian Tube, Endo
Resection of Left Eustachian Tube, Open Approach
Resection of Left Eustachian Tube, Perc Endo Approach
Resection of Left Eustachian Tube, Via Opening