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Appendix 1.32 – Mapping Schema for ICO03 to ICD10CA
From Cancer Care Ontario's Data Book - [email protected]
MAPPING SCHEMA FOR
ICD-O-3 TO ICD-10-CA
DRAFT
NOV 9/07
OBJECTIVE:
The purpose of Mapping ICD-0-3 TO ICD-10-CA is done so that the core terminologies work to
achieve the vision of a comprehensive and useful vocabulary system to serve clinical care. It is
essential that conversion/mappings tables be available to CIHI approved vendors so that all data
submitted to Cancer Care Ontario (CCO) from the Integrated Cancer Program centres are
comparably coded and abstracted.
This document contains the following sections:
1. Reference Files used for mapping
2. Mapping Methodology
3. Topography
4. Morphology
Appendix A: Process Flow – ICD-0-3 Mapping for Topography
Appendix B: Process Flow – ICD-0-3 Mapping for Morphology
1. Reference Files:
a) ICD-0-3 (International Classification of Disease for Oncology – 3rd edition)
b) ICD-10-CA (International Statistical Classification of Diseases and Related Health Problems
10th revision, Canada-2007).
c) Surveillance, Epidemiology and End Results Program (SEER) program ICD 03-2 manual:
http://seer.cancer.gov/tools/conversion/ICDO3-2manual.pdf.
2. Mapping Methodology:
a) In the ICD-0-3, Topography, histology and behaviour codes have been mapped to
ICD-10-CA.
b) Additional histology and behaviour codes indicated by CCO have also been mapped to
ICD-10-CA.
Note: When one classification is mapped to another it is difficult to conduct a precise code
mapping due to differences in granularity, management of context and version control; inevitably
some specificity may be lost.
4. TOPOGRAPHY:
1
The IARC/IACR (International Agency for Research on Cancer) Web Conversion Tools for Cancer
Registries was used as a reference for the mapping of ICD-0-3 Topography to ICD-10-CA codes.
1) The mapping indicates a one to many relationship.
2) Specified behaviour types as well as morphologies are indicated for the correct mapping to
ICD-10-CA (as histology and behaviour are included in the ICD-10-CA code and description)
/0
for benign neoplasm
/1
for uncertain whether benign or malignant neoplasm
/2
for carcinoma in situ
/3
for malignant neoplasm, primary site
/6
for malignant neoplasm, metastatic site
3) Default ICD-10-CA codes have been assigned when mapping could not take place for
instances where laterality in ICD-10-CA was involved and in other specific mappings dealing
with behaviour types.
Refer to flow chart for mapping Topography in Appendix A.
5. MORPHOLOGY:
It is important to note that the base document that is used for the conversion/or mapping the
morphology codes from ICD-O-3 to ICD-O-2 is the Surveillance, Epidemiology and End Results
Program (SEER) program.
1) The mapping indicates a one to many relationship
2) All of the ICD-0-2 morphology codes were validated with ICD-10-CA morphology codes.
3) For those ICD-10-CA morphology codes that were not available, default codes were used
with their corresponding behaviour types to reflect ICD-0-3 behaviour.
The default codes used are:
80000 Neoplasm, benign
80001 Neoplasm, uncertain whether benign or malignant
80003 Neoplasm, malignant
80006 Neoplasm, metastatic
80102 Carcinoma in-situ NOS
80103 Carcinoma NOS
Note:
 For the ICD-O-3 code with the behavior type “9” the default code was mapped to 80003
Neoplasm, Malignant.
 For the CCO defined morphology codes the above ICD-10-CA default morphology codes
were assigned.
Refer to flow chart for mapping Morphology in Appendix B.
2
Appendix A: Process Flow – ICD-0-3 Mapping for Topography
Start
Using IARC Tool for listing of all ICD-0-3 Topography
and mapping to ICD-10-CA Diagnoses codes (range of
C00 to D48). Histology &/or behaviour types need to
be incorporated to allow for mapping.
Is the ICD-0-3 morphology
code mapped to an
appropriate histological &/or
behaviour type to a
corresponding ICD-10-CA
code?
Yes
Mapping
validated
No
Assign Default ICD-10-CA code. Default codes agreed
to by pathologists. This is particularly evident with ICD10-CA codes with laterality.
End
3
Appendix B: Process Flow – ICD-0-3 Mapping for Morphology
Start
Using SEER Conversion table (ICD-0-3 to ICD-0-2)
validated with the ICD-10-CA morphology codes
Yes
Is the ICD-0-2 code
validated with the
ICD-10-CA
morphology code?
Mapping
validated
No
CCO default behavior codes were
used based on the behavior codes in
ICD-O-3: Any ICD-0-3 code ending in:
/0
/1
ICD-10-CA Default morphology codes:
80000- Neoplasm, Benign
80001- Neoplasm uncertain whether
benign or malignant
80003 - Neoplasm, Malignant
80006 - Neoplasm, Metastatic
80102 - Carcinoma in situ
/3 &/or /9
/6
/2
End
4