When the principal diagnosis is one of these 24 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
T24.301AT24.302AT24.309AT24.321AT24.322AT24.329AT24.391AT24.392AT24.399AT24.701AT24.702AT24.709AT24.721AT24.722AT24.729AT24.791AT24.792AT24.799AT25.391AT25.392AT25.399AT25.791AT25.792AT25.799A