The Body Part Appendix is identified by letter "J" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0DNJ
Release Appendix, Endo
Release Appendix, Open Approach
Release Appendix, Percutaneous Endoscopic Approach
Release Appendix, Percutaneous Approach
Release Appendix, Via Natural or Artificial Opening