SEER Inquiry System - Question 20140026 Details

System Guide

Back to Search Results

SEER Inquiry System - Report

Produced: 09/08/2025 1:50 PM

Question 20140026

Export CSV Export PDF Print

Add to Report

Inquiry Details

References:

ICD-O-3

Question:

Histology: Are all well differentiated neuroendocrine carcinomas (carcinoid) tumors coded to 8240 or 8246? When do you use code 8246?

Discussion:

Answer:

Code 8246 is correct when the mass/lesion is referred to as neuroendocrine "carcinoma" or NEC. Use code 8240 when the mass/lesion is referred to as a neuroendocrine "tumor" or NET G1. The difference is the word tumor versus carcinoma. Carcinoid is most often used interchangeably with neuroendocrine tumor and not with neuroendocrine carcinoma.

Cancer Site Category:

N/A

Data Item Category:

Histology

Other Category:

N/A

Year:

2014