When the principal diagnosis is one of these 21 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
O41.01X0
O41.03X9
O41.01X1
O41.01X2
O41.01X3
O41.01X4
O41.01X5
O41.01X9
O41.02X0
O41.02X1
O41.02X2
O41.02X3
O41.02X4
O41.02X5
O41.02X9
O41.03X0
O41.03X1
O41.03X2
O41.03X3
O41.03X4
O41.03X5