Updated Release of CDC NPCR’s NorthCon 21 Record Converter

  • 1.  Updated Release of CDC NPCR’s NorthCon 21 Record Converter

    Posted 03-03-2021 12:47


    Sent on behalf of Joe Rogers


    Date:                     March 3, 2021         


    To:                        NAACCR ListServ members           


    From:                   Joseph D. Rogers, M.S.

                   Team Lead: Informatics, Data Science, and Applications Team

                                 Cancer Surveillance Branch

                                 Division of Cancer Prevention and Control, NCCDPHP, CDC


    Subject:               Updated Release of CDC NPCR's NorthCon 21 Record Converter



    We are very pleased to announce that CDC's NPCR has released an updated version of the NorthCon record converter program. NorthCon21.exe, a freestanding program for Microsoft Windows, converts files of cancer registry records from NAACCR 18 to NAACCR 21, which are data formats prescribed by the North American Association of Central Cancer Registries (NAACCR). Input files should conform to NAACCR version 18 fixed width files. Converted output files will contain records in the NAACCR version 21 XML standard format. This updated version is available at:


    This second release of NorthCon 21 includes the latest TNM9.dll released on February 23, 2021, and it also includes the nconv21.dll that can be used to perform conversion with a program other than NorthCon21.exe. After install, the nconv21.dll can be found in the same directory where you install NorthCon210. No changes were made to conversion specifications for this release.


    Once you install NorthCon210, a file called Conversion to NAACCR v21.docx, will be stored in the Northcon application folder. This document provides information regarding the user dictionary, accessing manual review, and information to describe the conversion specifications.


    Northcon21.exe performs the following conversions as specified in NAACCR's Implementation Guide for 2021, available from the NAACCR web site:


    • Conversions related to staging, grade, and SSDI fields for cases diagnosed on or after January 1, 2018 and lists some of these cases for review. 
      • Most scenarios requiring manual review are for those collecting AJCC TNM 8th Edition staging and EOD. For registries not requiring AJCC TNM staging and EOD, the review is optional; however, manual review listings will be generated if the file contains records with AJCC TNM and/or EOD staging data items populated.
    • Move data from Name--Maiden to new item, Name--Birth Surname
    • Set Staging API Versions Original and Current based on Date of Diagnosis
    • Convert Phase I Radiation Treatment Modality
    • The NAACCR Record Version [item 50] value is set to '210' in each converted record.


    For more information about this NPCR utility, please visit our utility programs web page:


    Please send all issues or support questions directly to the Helpdesk at


    Please share this information with other members of your team, as appropriate.


    Thank you,



    Joseph D. Rogers (Joe), MS

    Team Lead: Informatics, Data Science, and Applications Team (IDSAT)

    Cancer Surveillance Branch, Division of Cancer Prevention and Control

    National Center for Chronic Disease Prevention and Health Promotion

    Centers for Disease Control and Prevention Chamblee Campus

    4770 Buford Highway NE, Mailstop F-76, Atlanta, GA 30341-3717

    CHAM Bldg 107 Rm 4128

    Office: 770-488-4701 | Mobile: 404-932-4428 | Email:

    Visit our website at:
    National Program of Cancer Registries (NPCR):