| C7A | Malignant neuroendocrine tumors |
| C7A.0 | Malignant carcinoid tumors |
| C7A.00 | Malignant carcinoid tumor of unspecified site |
| C7A.01 | Malignant carcinoid tumors of the small intestine |
| C7A.010 | Malignant carcinoid tumor of the duodenum |
| C7A.011 | Malignant carcinoid tumor of the jejunum |
| C7A.012 | Malignant carcinoid tumor of the ileum |
| C7A.019 | Malignant carcinoid tumor of the small intestine, unspecified portion |
| C7A.02 | Malignant carcinoid tumors of the appendix, large intestine, and rectum |
| C7A.020 | Malignant carcinoid tumor of the appendix |
| C7A.021 | Malignant carcinoid tumor of the cecum |
| C7A.022 | Malignant carcinoid tumor of the ascending colon |
| C7A.023 | Malignant carcinoid tumor of the transverse colon |
| C7A.024 | Malignant carcinoid tumor of the descending colon |
| C7A.025 | Malignant carcinoid tumor of the sigmoid colon |
| C7A.026 | Malignant carcinoid tumor of the rectum |
| C7A.029 | Malignant carcinoid tumor of the large intestine, unspecified portion |
| C7A.09 | Malignant carcinoid tumors of other sites |
| C7A.090 | Malignant carcinoid tumor of the bronchus and lung |
| C7A.091 | Malignant carcinoid tumor of the thymus |
| C7A.092 | Malignant carcinoid tumor of the stomach |
| C7A.093 | Malignant carcinoid tumor of the kidney |
| C7A.094 | Malignant carcinoid tumor of the foregut NOS |
| C7A.095 | Malignant carcinoid tumor of the midgut NOS |
| C7A.096 | Malignant carcinoid tumor of the hindgut NOS |
| C7A.098 | Malignant carcinoid tumors of other sites |
| C7A.1 | Malignant poorly differentiated neuroendocrine tumors |
| C7A.8 | Other malignant neuroendocrine tumors |
| C7B | Secondary neuroendocrine tumors |
| C7B.0 | Secondary carcinoid tumors |
| C7B.00 | Secondary carcinoid tumors, unspecified site |
| C7B.01 | Secondary carcinoid tumors of distant lymph nodes |
| C7B.02 | Secondary carcinoid tumors of liver |
| C7B.03 | Secondary carcinoid tumors of bone |
| C7B.04 | Secondary carcinoid tumors of peritoneum |
| C7B.09 | Secondary carcinoid tumors of other sites |
| C7B.1 | Secondary Merkel cell carcinoma |
| C7B.8 | Other secondary neuroendocrine tumors |
| C76 | Malignant neoplasm of other and ill-defined sites |
| C76.0 | Malignant neoplasm of head, face and neck |
| C76.1 | Malignant neoplasm of thorax |
| C76.2 | Malignant neoplasm of abdomen |
| C76.3 | Malignant neoplasm of pelvis |
| C76.4 | Malignant neoplasm of upper limb |
| C76.40 | Malignant neoplasm of unspecified upper limb |
| C76.41 | Malignant neoplasm of right upper limb |
| C76.42 | Malignant neoplasm of left upper limb |
| C76.5 | Malignant neoplasm of lower limb |
| C76.50 | Malignant neoplasm of unspecified lower limb |
| C76.51 | Malignant neoplasm of right lower limb |
| C76.52 | Malignant neoplasm of left lower limb |
| C76.8 | Malignant neoplasm of other specified ill-defined sites |
| C77 | Secondary and unspecified malignant neoplasm of lymph nodes |
| C77.0 | Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck |
| C77.1 | Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes |
| C77.2 | Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes |
| C77.3 | Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes |
| C77.4 | Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes |
| C77.5 | Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes |
| C77.8 | Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions |
| C77.9 | Secondary and unspecified malignant neoplasm of lymph node, unspecified |
| C78 | Secondary malignant neoplasm of respiratory and digestive organs |
| C78.0 | Secondary malignant neoplasm of lung |
| C78.00 | Secondary malignant neoplasm of unspecified lung |
| C78.01 | Secondary malignant neoplasm of right lung |
| C78.02 | Secondary malignant neoplasm of left lung |
| C78.1 | Secondary malignant neoplasm of mediastinum |
| C78.2 | Secondary malignant neoplasm of pleura |
| C78.3 | Secondary malignant neoplasm of other and unspecified respiratory organs |
| C78.30 | Secondary malignant neoplasm of unspecified respiratory organ |
| C78.39 | Secondary malignant neoplasm of other respiratory organs |
| C78.4 | Secondary malignant neoplasm of small intestine |
| C78.5 | Secondary malignant neoplasm of large intestine and rectum |
| C78.6 | Secondary malignant neoplasm of retroperitoneum and peritoneum |
| C78.7 | Secondary malignant neoplasm of liver and intrahepatic bile duct |
| C78.8 | Secondary malignant neoplasm of other and unspecified digestive organs |
| C78.80 | Secondary malignant neoplasm of unspecified digestive organ |
| C78.89 | Secondary malignant neoplasm of other digestive organs |
| C79 | Secondary malignant neoplasm of other and unspecified sites |
| C79.0 | Secondary malignant neoplasm of kidney and renal pelvis |
| C79.00 | Secondary malignant neoplasm of unspecified kidney and renal pelvis |
| C79.01 | Secondary malignant neoplasm of right kidney and renal pelvis |
| C79.02 | Secondary malignant neoplasm of left kidney and renal pelvis |
| C79.1 | Secondary malignant neoplasm of bladder and other and unspecified urinary organs |
| C79.10 | Secondary malignant neoplasm of unspecified urinary organs |
| C79.11 | Secondary malignant neoplasm of bladder |
| C79.19 | Secondary malignant neoplasm of other urinary organs |
| C79.2 | Secondary malignant neoplasm of skin |
| C79.3 | Secondary malignant neoplasm of brain and cerebral meninges |
| C79.31 | Secondary malignant neoplasm of brain |
| C79.32 | Secondary malignant neoplasm of cerebral meninges |
| C79.4 | Secondary malignant neoplasm of other and unspecified parts of nervous system |
| C79.40 | Secondary malignant neoplasm of unspecified part of nervous system |
| C79.49 | Secondary malignant neoplasm of other parts of nervous system |
| C79.5 | Secondary malignant neoplasm of bone and bone marrow |
| C79.51 | Secondary malignant neoplasm of bone |
| C79.52 | Secondary malignant neoplasm of bone marrow |
| C79.6 | Secondary malignant neoplasm of ovary |
| C79.60 | Secondary malignant neoplasm of unspecified ovary |
| C79.61 | Secondary malignant neoplasm of right ovary |
| C79.62 | Secondary malignant neoplasm of left ovary |
| C79.7 | Secondary malignant neoplasm of adrenal gland |
| C79.70 | Secondary malignant neoplasm of unspecified adrenal gland |
| C79.71 | Secondary malignant neoplasm of right adrenal gland |
| C79.72 | Secondary malignant neoplasm of left adrenal gland |
| C79.8 | Secondary malignant neoplasm of other specified sites |
| C79.81 | Secondary malignant neoplasm of breast |
| C79.82 | Secondary malignant neoplasm of genital organs |
| C79.89 | Secondary malignant neoplasm of other specified sites |
| C79.9 | Secondary malignant neoplasm of unspecified site |
| C80 | Malignant neoplasm without specification of site |
| C80.0 | Disseminated malignant neoplasm, unspecified |
| C80.1 | Malignant (primary) neoplasm, unspecified |
| C80.2 | Malignant neoplasm associated with transplanted organ |