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 0RNCX
Release Right Temporomandibular Joint, Percutaneous Approach
Release Right Temporomandibular Joint, Open Approach
Release Right Temporomandibular Joint, External Approach
Release Right Temporomandibular Joint, Perc Endo Approach