When the principal diagnosis is one of these 18 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
J22J93.0–J93.11 (2 codes)J93.81–J93.9 (4 codes)J95.811–J95.812 (2 codes)J98.4J98.8–J98.9 (2 codes)N80.B1–N80.B39 (5 codes)R91.1