| D3A | Benign neuroendocrine tumors |
| D3A.0 | Benign carcinoid tumors |
| D3A.00 | Benign carcinoid tumor of unspecified site |
| D3A.01 | Benign carcinoid tumors of the small intestine |
| D3A.010 | Benign carcinoid tumor of the duodenum |
| D3A.011 | Benign carcinoid tumor of the jejunum |
| D3A.012 | Benign carcinoid tumor of the ileum |
| D3A.019 | Benign carcinoid tumor of the small intestine, unspecified portion |
| D3A.02 | Benign carcinoid tumors of the appendix, large intestine, and rectum |
| D3A.020 | Benign carcinoid tumor of the appendix |
| D3A.021 | Benign carcinoid tumor of the cecum |
| D3A.022 | Benign carcinoid tumor of the ascending colon |
| D3A.023 | Benign carcinoid tumor of the transverse colon |
| D3A.024 | Benign carcinoid tumor of the descending colon |
| D3A.025 | Benign carcinoid tumor of the sigmoid colon |
| D3A.026 | Benign carcinoid tumor of the rectum |
| D3A.029 | Benign carcinoid tumor of the large intestine, unspecified portion |
| D3A.09 | Benign carcinoid tumors of other sites |
| D3A.090 | Benign carcinoid tumor of the bronchus and lung |
| D3A.091 | Benign carcinoid tumor of the thymus |
| D3A.092 | Benign carcinoid tumor of the stomach |
| D3A.093 | Benign carcinoid tumor of the kidney |
| D3A.094 | Benign carcinoid tumor of the foregut NOS |
| D3A.095 | Benign carcinoid tumor of the midgut NOS |
| D3A.096 | Benign carcinoid tumor of the hindgut NOS |
| D3A.098 | Benign carcinoid tumors of other sites |
| D3A.8 | Other benign neuroendocrine tumors |
| D37 | Neoplasm of uncertain behavior of oral cavity and digestive organs |
| D37.0 | Neoplasm of uncertain behavior of lip, oral cavity and pharynx |
| D37.01 | Neoplasm of uncertain behavior of lip |
| D37.02 | Neoplasm of uncertain behavior of tongue |
| D37.03 | Neoplasm of uncertain behavior of the major salivary glands |
| D37.030 | Neoplasm of uncertain behavior of the parotid salivary glands |
| D37.031 | Neoplasm of uncertain behavior of the sublingual salivary glands |
| D37.032 | Neoplasm of uncertain behavior of the submandibular salivary glands |
| D37.039 | Neoplasm of uncertain behavior of the major salivary glands, unspecified |
| D37.04 | Neoplasm of uncertain behavior of the minor salivary glands |
| D37.05 | Neoplasm of uncertain behavior of pharynx |
| D37.09 | Neoplasm of uncertain behavior of other specified sites of the oral cavity |
| D37.1 | Neoplasm of uncertain behavior of stomach |
| D37.2 | Neoplasm of uncertain behavior of small intestine |
| D37.3 | Neoplasm of uncertain behavior of appendix |
| D37.4 | Neoplasm of uncertain behavior of colon |
| D37.5 | Neoplasm of uncertain behavior of rectum |
| D37.6 | Neoplasm of uncertain behavior of liver, gallbladder and bile ducts |
| D37.8 | Neoplasm of uncertain behavior of other specified digestive organs |
| D37.9 | Neoplasm of uncertain behavior of digestive organ, unspecified |
| D38 | Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs |
| D38.0 | Neoplasm of uncertain behavior of larynx |
| D38.1 | Neoplasm of uncertain behavior of trachea, bronchus and lung |
| D38.2 | Neoplasm of uncertain behavior of pleura |
| D38.3 | Neoplasm of uncertain behavior of mediastinum |
| D38.4 | Neoplasm of uncertain behavior of thymus |
| D38.5 | Neoplasm of uncertain behavior of other respiratory organs |
| D38.6 | Neoplasm of uncertain behavior of respiratory organ, unspecified |
| D39 | Neoplasm of uncertain behavior of female genital organs |
| D39.0 | Neoplasm of uncertain behavior of uterus |
| D39.1 | Neoplasm of uncertain behavior of ovary |
| D39.10 | Neoplasm of uncertain behavior of unspecified ovary |
| D39.11 | Neoplasm of uncertain behavior of right ovary |
| D39.12 | Neoplasm of uncertain behavior of left ovary |
| D39.2 | Neoplasm of uncertain behavior of placenta |
| D39.8 | Neoplasm of uncertain behavior of other specified female genital organs |
| D39.9 | Neoplasm of uncertain behavior of female genital organ, unspecified |
| D40 | Neoplasm of uncertain behavior of male genital organs |
| D40.0 | Neoplasm of uncertain behavior of prostate |
| D40.1 | Neoplasm of uncertain behavior of testis |
| D40.10 | Neoplasm of uncertain behavior of unspecified testis |
| D40.11 | Neoplasm of uncertain behavior of right testis |
| D40.12 | Neoplasm of uncertain behavior of left testis |
| D40.8 | Neoplasm of uncertain behavior of other specified male genital organs |
| D40.9 | Neoplasm of uncertain behavior of male genital organ, unspecified |
| D41 | Neoplasm of uncertain behavior of urinary organs |
| D41.0 | Neoplasm of uncertain behavior of kidney |
| D41.00 | Neoplasm of uncertain behavior of unspecified kidney |
| D41.01 | Neoplasm of uncertain behavior of right kidney |
| D41.02 | Neoplasm of uncertain behavior of left kidney |
| D41.1 | Neoplasm of uncertain behavior of renal pelvis |
| D41.10 | Neoplasm of uncertain behavior of unspecified renal pelvis |
| D41.11 | Neoplasm of uncertain behavior of right renal pelvis |
| D41.12 | Neoplasm of uncertain behavior of left renal pelvis |
| D41.2 | Neoplasm of uncertain behavior of ureter |
| D41.20 | Neoplasm of uncertain behavior of unspecified ureter |
| D41.21 | Neoplasm of uncertain behavior of right ureter |
| D41.22 | Neoplasm of uncertain behavior of left ureter |
| D41.3 | Neoplasm of uncertain behavior of urethra |
| D41.4 | Neoplasm of uncertain behavior of bladder |
| D41.8 | Neoplasm of uncertain behavior of other specified urinary organs |
| D41.9 | Neoplasm of uncertain behavior of unspecified urinary organ |
| D42 | Neoplasm of uncertain behavior of meninges |
| D42.0 | Neoplasm of uncertain behavior of cerebral meninges |
| D42.1 | Neoplasm of uncertain behavior of spinal meninges |
| D42.9 | Neoplasm of uncertain behavior of meninges, unspecified |
| D43 | Neoplasm of uncertain behavior of brain and central nervous system |
| D43.0 | Neoplasm of uncertain behavior of brain, supratentorial |
| D43.1 | Neoplasm of uncertain behavior of brain, infratentorial |
| D43.2 | Neoplasm of uncertain behavior of brain, unspecified |
| D43.3 | Neoplasm of uncertain behavior of cranial nerves |
| D43.4 | Neoplasm of uncertain behavior of spinal cord |
| D43.8 | Neoplasm of uncertain behavior of other specified parts of central nervous system |
| D43.9 | Neoplasm of uncertain behavior of central nervous system, unspecified |
| D44 | Neoplasm of uncertain behavior of endocrine glands |
| D44.0 | Neoplasm of uncertain behavior of thyroid gland |
| D44.1 | Neoplasm of uncertain behavior of adrenal gland |
| D44.10 | Neoplasm of uncertain behavior of unspecified adrenal gland |
| D44.11 | Neoplasm of uncertain behavior of right adrenal gland |
| D44.12 | Neoplasm of uncertain behavior of left adrenal gland |
| D44.2 | Neoplasm of uncertain behavior of parathyroid gland |
| D44.3 | Neoplasm of uncertain behavior of pituitary gland |
| D44.4 | Neoplasm of uncertain behavior of craniopharyngeal duct |
| D44.5 | Neoplasm of uncertain behavior of pineal gland |
| D44.6 | Neoplasm of uncertain behavior of carotid body |
| D44.7 | Neoplasm of uncertain behavior of aortic body and other paraganglia |
| D44.9 | Neoplasm of uncertain behavior of unspecified endocrine gland |
| D45 | Polycythemia vera |
| D46 | Myelodysplastic syndromes |
| D46.0 | Refractory anemia without ring sideroblasts, so stated |
| D46.1 | Refractory anemia with ring sideroblasts |
| D46.2 | Refractory anemia with excess of blasts |
| D46.20 | Refractory anemia with excess of blasts, unspecified |
| D46.21 | Refractory anemia with excess of blasts 1 |
| D46.22 | Refractory anemia with excess of blasts 2 |
| D46.A | Refractory cytopenia with multilineage dysplasia |
| D46.B | Refractory cytopenia with multilineage dysplasia and ring sideroblasts |
| D46.C | Myelodysplastic syndrome with isolated del(5q) chromosomal abnormality |
| D46.4 | Refractory anemia, unspecified |
| D46.Z | Other myelodysplastic syndromes |
| D46.9 | Myelodysplastic syndrome, unspecified |
| D47 | Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue |
| D47.0 | Histiocytic and mast cell tumors of uncertain behavior |
| D47.1 | Chronic myeloproliferative disease |
| D47.2 | Monoclonal gammopathy |
| D47.3 | Essential (hemorrhagic) thrombocythemia |
| D47.4 | Osteomyelofibrosis |
| D47.Z | Other specified neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue |
| D47.Z1 | Post-transplant lymphoproliferative disorder (PTLD) |
| D47.Z9 | Other specified neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue |
| D47.9 | Neoplasm of uncertain behavior of lymphoid, hematopoietic and related tissue, unspecified |
| D48 | Neoplasm of uncertain behavior of other and unspecified sites |
| D48.0 | Neoplasm of uncertain behavior of bone and articular cartilage |
| D48.1 | Neoplasm of uncertain behavior of connective and other soft tissue |
| D48.2 | Neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system |
| D48.3 | Neoplasm of uncertain behavior of retroperitoneum |
| D48.4 | Neoplasm of uncertain behavior of peritoneum |
| D48.5 | Neoplasm of uncertain behavior of skin |
| D48.6 | Neoplasm of uncertain behavior of breast |
| D48.60 | Neoplasm of uncertain behavior of unspecified breast |
| D48.61 | Neoplasm of uncertain behavior of right breast |
| D48.62 | Neoplasm of uncertain behavior of left breast |
| D48.7 | Neoplasm of uncertain behavior of other specified sites |
| D48.9 | Neoplasm of uncertain behavior, unspecified |