The Body Part Thoracic Duct is identified by letter "K" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 07JK
Inspection of Thoracic Duct, Percutaneous Approach
Inspection of Thoracic Duct, Perc Endo Approach
Inspection of Thoracic Duct, Open Approach