SEER Inquiry System - Question 20010118 Details

System Guide

Back to Search Results

SEER Inquiry System - Report

Produced: 05/02/2026 10:18 AM

Question 20010118

Export CSV Export PDF Print

Add to Report

Inquiry Details

References:

SEER App F, 2003+ Surg Codes. January 2003

Question:

All Surgical Fields/Radiation Sequence with Surgery--Unknown Primaries: What codes are used to represent these fields for an unknown primary treated with a radical neck dissection followed by radiation therapy?

Discussion:

Answer:

For unknown primaries treated with a lymph node dissection and diagnosed 1/1/2003 and after, code:

1) Surgery to Primary Site: 98 [All unknown and ill-defined disease sites, WITH or WITHOUT surgical treatment].

2) Scope of Regional Lymph Node Surgery: 9 [Unknown or not applicable].

3) Surgical Procedure of Other Site: 1 [Surgery to other site(s) or node(s), NOS; unknown if regional or distant].

4) Radiation Sequence with Surgery: 3 [Radiation after surgery]. Any planned surgical treatment is used to code radiation/surgery sequence (per CoC I&R).

History:

For cases diagnosed 1998-2002, code:

1) Surgery to Primary Site to 00.

2) Scope of Regional Lymph Node Surgery to 0.

3) Surgery of Other Regional Site(s), Distant Site(s) or Distant Lymph Nodes to 1.

4) Radiation Sequence with Surgery to 3.

Cancer Site Category:

Unknown & ill-defined sit

Data Item Category:

Radiation Therapy

Other Category:

N/A

Year:

2001