A reference set designed to support the process of mapping data from one code system, classification, or terminology to another code system, classification, or terminology.

Notes

• There are several types of mapping reference set each of these supports different types of mapping.
  • Simple Map Reference Sets support one-to-one maps to or from SNOMED CT.
  • Complex and Extended Map Reference Sets support maps where additional information is required to determine the correct mapping from SNOMED CT to a statistical classification such as ICD-10.
  • Map Correlation and Origin Reference Sets support maps to or from another code system where there is an additional requirement to record cases in which a code in one code system was added specifically for the purpose of enabling a map from the codes system in which the code originated.
  • Code to Expression Reference Sets support maps from other code systems in cases where some or all the source codes may need to be represented by a postcoordinated expression.

Alternatives

• Cross mapping

Related Links

• Glossary
  • Mapping
  • Postcoordinated expression
• Release File Specification
  • 5.2.9 Simple Map Reference Set
  • 5.2.3.3 Complex and Extended Map from SNOMED CT Reference Sets
  • 5.2.3.4 Map to SNOMED CT with Correlation and Origin Reference Set
  • 5.2.3.5 Code to Expression Reference Set
• Specific Mapping Guides
  • ICD-10 Mapping Technical Guide