When the principal diagnosis is one of these 27 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
G20.A1–G20.C (5 codes)G21.11–G21.9 (7 codes)G24.2G25.70–G25.79 (3 codes)G25.89–G25.9 (2 codes)G80.3G93.40–G93.49 (7 codes)I67.83