Code
Hierarchy
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C00-D49 Neoplasms (C00-D49)
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D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
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D37 Neoplasm of uncertain behavior of oral cavity and digestive organs
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D38 Neoplasm of uncertain behavior of middle ear and respiratory and intrathoracic organs
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D39 Neoplasm of uncertain behavior of female genital organs
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D40 Neoplasm of uncertain behavior of male genital organs
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D41 Neoplasm of uncertain behavior of urinary organs
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D42 Neoplasm of uncertain behavior of meninges
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D43 Neoplasm of uncertain behavior of brain and central nervous system
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D44 Neoplasm of uncertain behavior of endocrine glands
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D45 Polycythemia vera
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D46 Myelodysplastic syndromes
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D47 Other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue
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D48 Neoplasm of uncertain behavior of other and unspecified sites
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Notes
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Categories D37-D44, and D48 classify by site neoplasms of uncertain behavior, i.e., histologic confirmation whether the neoplasm is malignant or benign cannot be made.
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Functional activity
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All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
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Morphology [Histology]
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Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
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Primary malignant neoplasms overlapping site boundaries
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A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
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Malignant neoplasm of ectopic tissue
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Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
- C25.9 Malignant neoplasm of pancreas, unspecified