Complex map type reference sets

Complex maps are used for one-to many or many-to-one mappings, where you can specify rules and advices for the map execution as well as the level of generalization or specialization. One-to-many mappings are displayed in the table in separate lines (see screenshot).

The following mappings are possible

Complex map editor showing one-to-many mapping of "Accidental poisoning"


Snow Owl is capable to import the SNOMED CT to ICD-10 Cross Map Preview release under development by IHTSDO and the World Health Organization. Note that this cross map is still under development by the IHTSDO SNOMED CT to ICD-10 Mapping Workbench project group and they welcome your feedback.

Complex map type reference sets

Updating the map target

Since Snow Owl does not ship with ICD-10, an additional step is required to fully integrate the cross map with SNOMED CT and ICD-10. Once the ICD-10 release has been imported, the mapping can be updated with details from the ICD-10 release. This makes navigation easier, as instead of an identifier, the actual ICD-10 code and label is displayed with an associated icon to identify the top-level parentage.

To start the update, right-click on the map and select Execute map target update.

Invoke update map target action from context menu

Select the terminology that should be used as the map target from the list.

Update map target with selected terminology component

Creating a complex map

To map from SNOMED CT to ICD-10 or ICD-10-AM, you have to create a complex map type reference set.

Now you can add members to the reference set. An integrated quick search facilitates the mapping.

Selecting a map target from ICD-10-AM

Besides these basic properties, you can select from a variety of pre-defined map rules and map templates and populate them with the appropriate SNOMED CT and ICD-10 identifiers that apply to the member. Quick search is available for Module, Map advise and Correlation, only valid results are displayed.

Complex map wizard

SNOMED CT to ICD-10-AM complex map

Note: If you want to map from ICD-10 or ICD-10-AM to SNOMED, you need to create a Mapping set.