The Body Part Retroperitoneum is identified by letter "H" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0WJH
Inspection of Retroperitoneum, Open Approach
Inspection of Retroperitoneum, Perc Endo Approach
Inspection of Retroperitoneum, Percutaneous Approach