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 091E0
Bypass L Inner Ear to Endolymphatic w Nonaut Sub, Open
Bypass Left Inner Ear to Endolymphatic, Open Approach
Bypass L Inner Ear to Endolymphatic w Autol Sub, Open
Bypass L Inner Ear to Endolymphatic w Synth Sub, Open