When the principal diagnosis is one of these 22 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
C21.0–C21.8 (4 codes)C26.0C26.9C45.7–C45.9 (2 codes)C46.4C7A.00C7A.098–C7B.00 (4 codes)C7B.1C76.8C80.0–C80.1 (2 codes)D49.0D49.81–D49.9 (3 codes)