When the principal diagnosis is one of these 20 codes, the CC/MCC codes assigned to this list count as non-CCs (MS-DRG v44 definitions manual, appendix C).
C82.55C83.15C84.00C84.05C84.08–C84.0A (3 codes)C84.45C84.65C84.75C84.A5C84.Z5C84.95C85.15C85.25C85.85C85.95D49.81–D49.9 (3 codes)