Code
Hierarchy
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C00-D49 Neoplasms (C00-D49)
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C00-C96 Malignant neoplasms (C00-C96)
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C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
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C77 Secondary and unspecified malignant neoplasm of lymph nodes
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C77.0 Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck
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C77.1 Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes
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C77.2 Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes
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C77.3 Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes
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C77.4 Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes
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C77.5 Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes
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C77.8 Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions
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C77.9 Secondary and unspecified malignant neoplasm of lymph node, unspecified
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Notes
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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