Other secondary neuroendocrine tumors

This code signifies the presence of metastatic neuroendocrine tumors originating from a primary site elsewhere in the body, but which are not specified as to their exact secondary location. These are malignant neoplasms composed of cells with neuroendocrine differentiation that have spread to other organs or tissues.

Use this code when documentation confirms a secondary neuroendocrine tumor, but the specific site of metastasis is not precisely identified or is described as "other specified" or "multiple sites" without further detail. This code is appropriate when the primary neuroendocrine tumor has been identified and treated, or when the primary site is unknown, and the metastatic disease is the focus of treatment.

• Always sequence the primary neuroendocrine tumor code first, if known, followed by this code for the secondary site.
• Avoid using this code if a more specific secondary site for the neuroendocrine tumor is documented (e.g., C7A.010 for secondary malignant neuroendocrine tumor of the liver).
• Ensure documentation clearly states "secondary" or "metastatic" neuroendocrine tumor to support the use of this code.