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SEER Inquiry System - Report
Produced: 07/25/2025 4:27 PM
Question 20041036
Inquiry Details
References:
2021 SEER Manual, 184-185. #6, #7
Question:
Surgery of Primary Site/Surgery codes, NOS--Colon: What tissue specimens are included under this field's code 41 [Subtotal colectomy/hemicolectomy plus resection of contiguous organ; example: small bowel, bladder]? See Discussion.
Discussion:
How is site specific surgery coded for the following two cases?
Example 1. A right hemicolectomy normally includes a portion of ileum.
Example 2. Subtotal colectomy with bilateral oophorectomy.
Answer:
Code 40 includes a right hemicolectomy. A right hemicolectomy normally includes a small portion of the terminal ileum removed with the ileocecal valve. Assign code 41 when resection of CONTIGUOUS organs goes beyond what would normally be removed as part of a subtotal colectomy/hemicolectomy. Record non-contiguous organ resection in Surgical Procedure of Other Site.
Example 1: Surgery of Primary Site -- 40 [Subtotal colectomy/hemicolectomy].
Example 2: Surgery of Primary Site -- 40 [Subtotal colectomy/hemicolectomy]. Surgical Procedure of Other Site -- 2 [Non-primary surgical procedure to other regional sites].
Addendum July 2021
For coding Surgical Procedure of Other Site, see the instructions for determining regional vs distant sites in the 2021 SEER manual under Coding Instructions #6 and #7 on pages 184-185. Do not use Summary Stage to determine regional vs distant for this data item.
