When the principal diagnosis is one of these 16 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
B77.0
B78.0
B78.7
B82.0
B77.89
B77.9
B78.9
B79
B80
B81.0
B81.1
B81.2