ICD-O-3.1-NCIt Mapping Files

The International Classification of Disease for Oncology (ICD-O) has long been an important coding resource for the cancer community, and EVS has long included it in our central mapping environment, NCI Metathesaurus (NCIm), with WHO permission. ICD-O-3.1 is the most recent version, approved by WHO/IARC in 2011 and published in 2013. In response to multiple user requests, we are now publishing the NCIm mappings of ICD-O-3.1 to NCIt. These are simple synonymy mappings for the codes and associated terms in both the Morphology and Topography axes, including the NCIm CUIs. We are working with multiple partners to cross-check these mappings, and to extend them to bi-axial coding for more specific cancers/neoplasms. As always, we invite user feedback (NCIThesaurus@nih.gov).

ICD-O-3.1-NCIt Morphology and ICD-O-3.1-NCIt Topography

This data is in the form of a tab delimited file with the following columns:

• ICD-O Code: ICD-O-3.1 code
• Level: ICD-O-3.1 level*
• Term Type: NCI Metathesaurus term type
• Term Type Desc: NCI Metathesaurus term type description
• ICD-O string: ICD-O-3.1 string
• NCIm CUI: NCI Metathesaurus Concept Unique Identifier
• NCIt Code: NCI Thesaurus code mapping (if applicable)
• NCIt PT string (Preferred term): Preferred term of NCI Thesaurus code