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 0YJFX
Inspection of Right Knee Region, Open Approach
Inspection of Right Knee Region, Perc Endo Approach
Inspection of Right Knee Region, Percutaneous Approach
Inspection of Right Knee Region, External Approach