Snap2SNOMED ( is a mapping tool that supports the collaborative authoring and maintenance of simple maps from other code systems to SNOMED CT. This Snap2SNOMED user guide explains the main features of the tool, and how these features can be used to create and maintain maps to SNOMED CT.

For information about mapping best practice and guidelines, please refer to the SNOMED CT Mapping Guide.

To contribute to future versions of the Snap2SNOMED mapping tool, please join the Mapping Tool User Group. To provide feedback on Snap2SNOMED, please use the 'Feedback' link at the bottom of each page in the tool, or email us at

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