1. C7B Secondary neuroendocrine tumors

    1. C7B.0 Secondary carcinoid tumors

      1. C7B.00 Secondary carcinoid tumors, unspecified site

      2. C7B.01 Secondary carcinoid tumors of distant lymph nodes

      3. C7B.02 Secondary carcinoid tumors of liver

      4. C7B.03 Secondary carcinoid tumors of bone

      5. C7B.04 Secondary carcinoid tumors of peritoneum

        Inclusion term(s):

        • Mesentary metastasis of carcinoid tumor
      6. C7B.09 Secondary carcinoid tumors of other sites

    2. C7B.1 Secondary Merkel cell carcinoma

      Inclusion term(s):

      • Merkel cell carcinoma nodal presentation
      • Merkel cell carcinoma visceral metastatic presentation
    3. C7B.8 Other secondary neuroendocrine tumors

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.