Malignant neuroendocrine tumors
28 codes in this section
About Section C7A
Section C7A (C7A-C7A) covers malignant neuroendocrine tumors. It sits within the Neoplasms chapter (C00-D49). This section contains 28 ICD-10-CM codes, 23 billable diagnoses you can submit on a claim, and 5 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in C7A
Grouped by 3-character root code. Click any code for full detail.
| C7A.0 | Malignant carcinoid tumors | Header |
| C7A.00 | Malignant carcinoid tumor of unspecified site | Billable |
| C7A.01 | Malignant carcinoid tumors of the small intestine | Header |
| C7A.010 | Malignant carcinoid tumor of the duodenum | Billable |
| C7A.011 | Malignant carcinoid tumor of the jejunum | Billable |
| C7A.012 | Malignant carcinoid tumor of the ileum | Billable |
| C7A.019 | Malignant carcinoid tumor of the small intestine, unspecified portion | Billable |
| C7A.02 | Malignant carcinoid tumors of the appendix, large intestine, and rectum | Header |
| C7A.020 | Malignant carcinoid tumor of the appendix | Billable |
| C7A.021 | Malignant carcinoid tumor of the cecum | Billable |
| C7A.022 | Malignant carcinoid tumor of the ascending colon | Billable |
| C7A.023 | Malignant carcinoid tumor of the transverse colon | Billable |
| C7A.024 | Malignant carcinoid tumor of the descending colon | Billable |
| C7A.025 | Malignant carcinoid tumor of the sigmoid colon | Billable |
| C7A.026 | Malignant carcinoid tumor of the rectum | Billable |
| C7A.029 | Malignant carcinoid tumor of the large intestine, unspecified portion | Billable |
| C7A.09 | Malignant carcinoid tumors of other sites | Header |
| C7A.090 | Malignant carcinoid tumor of the bronchus and lung | Billable |
| C7A.091 | Malignant carcinoid tumor of the thymus | Billable |
| C7A.092 | Malignant carcinoid tumor of the stomach | Billable |
| C7A.093 | Malignant carcinoid tumor of the kidney | Billable |
| C7A.094 | Malignant carcinoid tumor of the foregut, unspecified | Billable |
| C7A.095 | Malignant carcinoid tumor of the midgut, unspecified | Billable |
| C7A.096 | Malignant carcinoid tumor of the hindgut, unspecified | Billable |
| C7A.098 | Malignant carcinoid tumors of other sites | Billable |
| C7A.1 | Malignant poorly differentiated neuroendocrine tumors | Billable |
| C7A.8 | Other malignant neuroendocrine tumors | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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