When the principal diagnosis is one of these 13 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
H47.611
H47.9
H47.621
H47.622
H47.629
H47.631
H47.632
H47.639
H47.641
H47.642
H47.649