Chapter 2
Neoplasms
C00–D49
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FY 2027 effective October 1, 2026 · 141 categories in this chapter
Blocks in This Chapter
ICD-10-CM groups this chapter's categories into 21 blocks of three-character categories.
- C00 –C14 Malignant neoplasms of lip, oral cavity and pharynx
- C15 –C26 Malignant neoplasms of digestive organs
- C30 –C39 Malignant neoplasms of respiratory and intrathoracic organs
- C40 –C41 Malignant neoplasms of bone and articular cartilage
- C43 –C44 Melanoma and other malignant neoplasms of skin
- C45 –C49 Malignant neoplasms of mesothelial and soft tissue
- C50 Malignant neoplasms of breast
- C51 –C58 Malignant neoplasms of female genital organs
- C60 –C63 Malignant neoplasms of male genital organs
- C64 –C68 Malignant neoplasms of urinary tract
- C69 –C72 Malignant neoplasms of eye, brain and other parts of central nervous system
- C73 –C75 Malignant neoplasms of thyroid and other endocrine glands
- C7A Malignant neuroendocrine tumors
- C7B Secondary neuroendocrine tumors
- C76 –C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites
- C81 –C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
- D00 –D09 In situ neoplasms
- D10 –D36 Benign neoplasms, except benign neuroendocrine tumors
- D3A Benign neuroendocrine tumors
- D37 –D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
- D49 Neoplasms of unspecified behavior
Categories
Benign neoplasms, except benign neuroendocrine tumors (D10-D36)
- D10 Benign neoplasm of mouth and pharynx Has subcategories
- D11 Benign neoplasm of major salivary glands Has subcategories
- D12 Benign neoplasm of colon, rectum, anus and anal canal Has subcategories
- D13 Benign neoplasm of other and ill-defined parts of digestive system Has subcategories
- D14 Benign neoplasm of middle ear and respiratory system Has subcategories
- D15 Benign neoplasm of other and unspecified intrathoracic organs Has subcategories
- D16 Benign neoplasm of bone and articular cartilage Has subcategories
- D17 Benign lipomatous neoplasm Has subcategories
- D18 Hemangioma and lymphangioma, any site Has subcategories
- D19 Benign neoplasm of mesothelial tissue Has subcategories
- D20 Benign neoplasm of soft tissue of retroperitoneum and peritoneum Has subcategories
- D21 Other benign neoplasms of connective and other soft tissue Has subcategories
- D22 Melanocytic nevi Has subcategories
- D23 Other benign neoplasms of skin Has subcategories
- D24 Benign neoplasm of breast Has subcategories
- D25 Leiomyoma of uterus Has subcategories
- D26 Other benign neoplasms of uterus Has subcategories
- D27 Benign neoplasm of ovary Has subcategories
- D28 Benign neoplasm of other and unspecified female genital organs Has subcategories
- D29 Benign neoplasm of male genital organs Has subcategories
- D30 Benign neoplasm of urinary organs Has subcategories
- D31 Benign neoplasm of eye and adnexa Has subcategories
- D32 Benign neoplasm of meninges Has subcategories
- D33 Benign neoplasm of brain and other parts of central nervous system Has subcategories
- D34 Benign neoplasm of thyroid gland
- D35 Benign neoplasm of other and unspecified endocrine glands Has subcategories
- D36 Benign neoplasm of other and unspecified sites Has subcategories
Benign neuroendocrine tumors (D3A)
Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
- D37 Neoplasm of uncertain behavior of oral cavity and digestive organs Has subcategories
- D38 Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs Has subcategories
- D39 Neoplasm of uncertain behavior of female genital organs Has subcategories
- D40 Neoplasm of uncertain behavior of male genital organs Has subcategories
- D41 Neoplasm of uncertain behavior of urinary organs Has subcategories
- D42 Neoplasm of uncertain behavior of meninges Has subcategories
- D43 Neoplasm of uncertain behavior of brain and central nervous system Has subcategories
- D44 Neoplasm of uncertain behavior of endocrine glands Has subcategories
- D45 Polycythemia vera
- D46 Myelodysplastic syndromes Has subcategories
- D47 Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue Has subcategories
- D48 Neoplasm of uncertain behavior of other and unspecified sites Has subcategories