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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