AHA Coding Clinic® for ICD-9 - 2011 Issue 4; Ask the Editor

Metastatic Mesenteric Carcinoid Tumor

Coding Clinic, Fourth Quarter 2009, page 150, advised code 209.74, Secondary neuroendocrine tumor of peritoneum, for a metastatic mesenteric carcinoid tumor. However, it has been suggested that code 209.71, Secondary neuroendocrine tumor of distant lymph nodes is a more appropriate code. "Mesentery metastasis" is an inclusion term under code 209.71. If the secondary Carcinoid tumor of the mesentery is not stated as lymph node metastasis, code 209.74 seems more appropriate. Similarly, referencing the neoplasm table for secondary malignant neoplasm of the peritoneum and the mesentery both are indexed to code 197.6, Secondary malignant neoplasm of retroperitoneum and peritoneum. Could you please advise as to which is the appropriate code assignment for secondary mesentery carcinoid tumor? ...

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