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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.

  1. C00 –C14 Malignant neoplasms of lip, oral cavity and pharynx
  2. C15 –C26 Malignant neoplasms of digestive organs
  3. C30 –C39 Malignant neoplasms of respiratory and intrathoracic organs
  4. C40 –C41 Malignant neoplasms of bone and articular cartilage
  5. C43 –C44 Melanoma and other malignant neoplasms of skin
  6. C45 –C49 Malignant neoplasms of mesothelial and soft tissue
  7. C50 Malignant neoplasms of breast
  8. C51 –C58 Malignant neoplasms of female genital organs
  9. C60 –C63 Malignant neoplasms of male genital organs
  10. C64 –C68 Malignant neoplasms of urinary tract
  11. C69 –C72 Malignant neoplasms of eye, brain and other parts of central nervous system
  12. C73 –C75 Malignant neoplasms of thyroid and other endocrine glands
  13. C7A Malignant neuroendocrine tumors
  14. C7B Secondary neuroendocrine tumors
  15. C76 –C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites
  16. C81 –C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
  17. D00 –D09 In situ neoplasms
  18. D10 –D36 Benign neoplasms, except benign neuroendocrine tumors
  19. D3A Benign neuroendocrine tumors
  20. D37 –D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
  21. D49 Neoplasms of unspecified behavior

Categories

Benign neoplasms, except benign neuroendocrine tumors (D10-D36)

Benign neuroendocrine tumors (D3A)

Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)

Neoplasms of unspecified behavior (D49)