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 00FUX
Fragmentation in Spinal Canal, Percutaneous Approach
Fragmentation in Spinal Canal, Perc Endo Approach
Fragmentation in Spinal Canal, External Approach
Fragmentation in Spinal Canal, Open Approach