Secondary carcinoid tumors, unspecified site

This code signifies the presence of metastatic neuroendocrine tumors originating from a primary carcinoid tumor, where the specific secondary location is not documented. These tumors typically arise from enterochromaffin cells and can spread to various organs.

Assign this code when medical record documentation confirms secondary carcinoid tumor involvement but does not specify the anatomical site of metastasis. This is appropriate when the primary carcinoid tumor has been identified or is presumed, and the metastatic spread is noted without further localization.

• Always attempt to identify and code the specific secondary site(s) if documented, using more specific codes from the C7B.0 category.
• Code the primary carcinoid tumor first, if known and still active, followed by this code for the secondary malignancy.
• Avoid using this code if the documentation clearly specifies the metastatic site (e.g., liver, lung); instead, use the appropriate C7B.0x code.