When the principal diagnosis is one of these 31 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
N47.6
N48.0
N48.31
N48.33
N48.9
N52.01
N52.03
N52.2
N52.9
N48.30
N48.32
N48.39