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).
K31.89
K31.9
K41.00
K41.91
K45.0
K45.8
K46.0
K92.81
K41.01
K41.30
K41.31