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).
A17.9A18.50–A18.59 (6 codes)A18.82A18.84A18.89A31.2–A31.9 (3 codes)A49.3–A49.9 (3 codes)B92B94.2–B94.9 (3 codes)