When the principal diagnosis is one of these 14 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
T28.1XXAT28.3XXAT28.40XAT28.411AT28.412AT28.419AT28.49XAT28.6XXAT28.8XXAT28.90XAT28.911AT28.912AT28.919AT28.99XA