When the principal diagnosis is one of these 23 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
A91
A94
A98.0
A98.2
A98.8
A99
B33.1
A92.0
A92.9
A93.1
A93.2
A93.8
A98.1