The Approach External is identified by letter "X" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 08CMX
Extirpation of Matter from L Extraoc Muscle, Perc Approach
Extirpation of Matter from L Extraoc Muscle, Open Approach
Extirpation of Matter from L Extraoc Muscle, Extern Approach