When the principal diagnosis is one of these 25 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
I21.01
I22.9
I27.841
I27.849
I87.8
I87.9
I99.8
I99.9
I21.02
I21.09
I21.11
I21.19
I21.21
I21.29
I21.3
I21.4
I21.9
I21.A1
I21.A9
I21.B
I22.0
I22.1
I22.2
I22.8