The Body Part Facial Nerve is identified by letter "M" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 00DM
Extraction of Facial Nerve, Open Approach
Extraction of Facial Nerve, Percutaneous Endoscopic Approach
Extraction of Facial Nerve, Percutaneous Approach