AHA Coding Clinic® for ICD-9 - 2009 Issue 4; Ask the Editor

Neuroendocrine Tumor with Multiple Endocrine Neoplasia Syndrome (MENS)

A patient was admitted for resection of a large mesenteric metastatic carcinoid tumor. The patient has history of resection of a previous small bowel carcinoid tumor. It was felt at the time of the first surgery that the large mass was unresectable. What is the principal diagnosis code assignment for metastatic malignant carcinoid when there is no mention of multiple endocrine neoplasia syndrome (MENS)? Why can't codes in category 209, Neuroendocrine tumors be sequenced as principal diagnosis? ...

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