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ICD-10-CM category C7A: Malignant neuroendocrine tumors

Category C7A is a heading in chapter 2 (Neoplasms (C00-D49)), section Malignant neuroendocrine tumors (C7A). It is not billable; report one of the 23 complete codes below.

Notes that apply to every C7A code

Excludes2 (not part of this condition, may be coded together)
  • malignant pancreatic islet cell tumors (C25.4)
  • Merkel cell carcinoma (C4A.-)
Use additional code
  • code to identify any associated endocrine syndrome, such as:
  • carcinoid syndrome (E34.00)
Code also
  • any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)

Billable codes in C7A

Billable FY2027 ICD-10-CM codes in category C7A
CodeDescription
C7A.00Malignant carcinoid tumor of unspecified site
C7A.010Malignant carcinoid tumor of the duodenum
C7A.011Malignant carcinoid tumor of the jejunum
C7A.012Malignant carcinoid tumor of the ileum
C7A.019Malignant carcinoid tumor of the small intestine, unspecified portion
C7A.020Malignant carcinoid tumor of the appendix
C7A.021Malignant carcinoid tumor of the cecum
C7A.022Malignant carcinoid tumor of the ascending colon
C7A.023Malignant carcinoid tumor of the transverse colon
C7A.024Malignant carcinoid tumor of the descending colon
C7A.025Malignant carcinoid tumor of the sigmoid colon
C7A.026Malignant carcinoid tumor of the rectum
C7A.029Malignant carcinoid tumor of the large intestine, unspecified portion
C7A.090Malignant carcinoid tumor of the bronchus and lung
C7A.091Malignant carcinoid tumor of the thymus
C7A.092Malignant carcinoid tumor of the stomach
C7A.093Malignant carcinoid tumor of the kidney
C7A.094Malignant carcinoid tumor of the foregut, unspecified
C7A.095Malignant carcinoid tumor of the midgut, unspecified
C7A.096Malignant carcinoid tumor of the hindgut, unspecified
C7A.098Malignant carcinoid tumors of other sites
C7A.1Malignant poorly differentiated neuroendocrine tumors
C7A.8Other malignant neuroendocrine tumors

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Codes from the FY2027 ICD-10-CM files (all chapters). Report the code that matches the documentation and the Official Guidelines; this list is not coding advice.