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 0YQQX
Repair Left 1st Toe, Percutaneous Endoscopic Approach
Repair Left 1st Toe, Open Approach
Repair Left 1st Toe, External Approach
Repair Left 1st Toe, Percutaneous Approach