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).
C82.51C83.11C84.10–C84.11 (2 codes)C84.18–C84.1A (3 codes)C84.41C84.61C84.71C84.A1C84.Z1C84.91C85.11C85.21C85.81C85.91C86.00–C86.01 (2 codes)D49.81–D49.9 (3 codes)