| C7A | Malignant neuroendocrine tumors | NON-BILLABLE CODE |
| C7A.0 | Malignant carcinoid tumors | NON-BILLABLE CODE |
| C7A.00 | Malignant carcinoid tumor of unspecified site | BILLABLE CODE |
| C7A.01 | Malignant carcinoid tumors of the small intestine | NON-BILLABLE CODE |
| C7A.010 | Malignant carcinoid tumor of the duodenum | BILLABLE CODE |
| C7A.011 | Malignant carcinoid tumor of the jejunum | BILLABLE CODE |
| C7A.012 | Malignant carcinoid tumor of the ileum | BILLABLE CODE |
| C7A.019 | Malignant carcinoid tumor of the small intestine, unspecified portion | BILLABLE CODE |
| C7A.02 | Malignant carcinoid tumors of the appendix, large intestine, and rectum | NON-BILLABLE CODE |
| C7A.020 | Malignant carcinoid tumor of the appendix | BILLABLE CODE |
| C7A.021 | Malignant carcinoid tumor of the cecum | BILLABLE CODE |
| C7A.022 | Malignant carcinoid tumor of the ascending colon | BILLABLE CODE |
| C7A.023 | Malignant carcinoid tumor of the transverse colon | BILLABLE CODE |
| C7A.024 | Malignant carcinoid tumor of the descending colon | BILLABLE CODE |
| C7A.025 | Malignant carcinoid tumor of the sigmoid colon | BILLABLE CODE |
| C7A.026 | Malignant carcinoid tumor of the rectum | BILLABLE CODE |
| C7A.029 | Malignant carcinoid tumor of the large intestine, unspecified portion | BILLABLE CODE |
| C7A.09 | Malignant carcinoid tumors of other sites | NON-BILLABLE CODE |
| C7A.090 | Malignant carcinoid tumor of the bronchus and lung | BILLABLE CODE |
| C7A.091 | Malignant carcinoid tumor of the thymus | BILLABLE CODE |
| C7A.092 | Malignant carcinoid tumor of the stomach | BILLABLE CODE |
| C7A.093 | Malignant carcinoid tumor of the kidney | BILLABLE CODE |
| C7A.094 | Malignant carcinoid tumor of the foregut, unspecified | BILLABLE CODE |
| C7A.095 | Malignant carcinoid tumor of the midgut, unspecified | BILLABLE CODE |
| C7A.096 | Malignant carcinoid tumor of the hindgut, unspecified | BILLABLE CODE |
| C7A.1 | Malignant poorly differentiated neuroendocrine tumors | BILLABLE CODE |
| C7A.8 | Other malignant neuroendocrine tumors | BILLABLE CODE |
