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 0MNBX
Release L Up Extrem Bursa/Lig, Extern Approach
Release L Up Extrem Bursa/Lig, Open Approach
Release L Up Extrem Bursa/Lig, Perc Approach
Release L Up Extrem Bursa/Lig, Perc Endo Approach