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 0SJ3X
Inspection of Lumbosacral Joint, Open Approach
Inspection of Lumbosacral Joint, Perc Endo Approach
Inspection of Lumbosacral Joint, Percutaneous Approach
Inspection of Lumbosacral Joint, External Approach