C7A.024Malignant carcinoid tumor of the descending colon

C7A.024 is the ICD-10-CM diagnosis code for malignant carcinoid tumor of the descending colon. It belongs to category C7A (malignant neuroendocrine tumors), block C7A (malignant neuroendocrine tumors) and chapter 2 (neoplasms). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within C7A.02 (malignant carcinoid tumors of the appendix, large intestine, and rectum), C7A.024 is specifically for malignant carcinoid tumor of the descending colon. Related codes cover appendix (C7A.020), cecum (C7A.021), ascending colon (C7A.022), transverse colon (C7A.023), sigmoid colon (C7A.025), rectum (C7A.026) and large intestine, unspecified portion (C7A.029).

Use an additional code to identify any associated endocrine syndrome, such as: carcinoid syndrome (E34.00).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 374 (Digestive Malignancy with MCC, relative weight 2.1109), DRG 375 (Digestive Malignancy with CC, relative weight 1.1838) and DRG 376 (Digestive Malignancy without CC/MCC, relative weight 0.8929), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 209.15 (malignant carcinoid tumor of the descending colon).