Complication or comorbidity
A diagnosis code being a CC is a grouper fact for that year. It is not printed as an instruction on the ICD-10-CM page.
Source: CMS-1849-CN, FY2027 IPPS correction notice, file dated September 23, 2026.
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Definition · Codes and claim data
Complication or comorbidity
A complication or comorbidity, and a major complication or comorbidity, are secondary diagnoses that can move an inpatient stay into a higher-paying MS-DRG. CMS lists them in the IPPS tables. The FY2027 Table 5 on this site shows the group title and weight, not the CC list itself. The lookup is at /drg.
Questions
Complication or comorbidity, answered
Does the ICD-10 page say whether a code is a CC?
No. The ICD-10 page shows the CDC description, excludes notes, and the CMS-HCC mapping when one is published. CC status is a grouper table.