When the principal diagnosis is one of these 28 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
G97.0G97.2–G97.32 (3 codes)G97.81–G97.84 (4 codes)H95.811–H95.89 (6 codes)I97.3I97.810–I97.821 (4 codes)M96.89N98.1–N98.9 (5 codes)T81.82XAT81.89XAT81.9XXA