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 0CC7X
Extirpation of Matter from Tongue, Open Approach
Extirpation of Matter from Tongue, External Approach
Extirpation of Matter from Tongue, Percutaneous Approach