When the principal diagnosis is one of these 20 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
T27.0XXAT27.1XXAT27.2XXAT27.3XXAT27.4XXAT27.5XXAT27.6XXAT27.7XXAT28.3XXAT28.40XAT28.411AT28.412AT28.419AT28.49XAT28.8XXAT28.90XAT28.911AT28.912AT28.919AT28.99XA