New features


LOINC (Logical Observation Identifiers Names and Codes) is used to identify medical laboratory observations. The latest version of LOINC is now available in Snow Owl. A view and an editor have been added to display LOINC content, it's also possible to search for LOINC content.


Icons are used to distinguish different LOINC parts (e.g. fertility testing, skin tests).

LOINC View, top-level grouping

Browsing LOINC

The LOINC view displays the short-names of the codes as a tree structure. Clicking on the triangles allows you to browse the multi-axial hierarchy. The functions in the navigator are similar to the other views (e.g. SNOMED CT).

LOINC View, top-level grouping

Search LOINC

Searching for LOINC codes works similar to searching within other terminologies.

Quick search allows a comprehensive search across all terminologies and classification systems. Search results for LOINC appear as a new category (see screenshot).

Quick search results displaying matches from SNOMED CT, ICD-10, and LOINC

The filter search in the LOINC view allows to display only matching terms in the hierarchy.

LOINC filter search results

A LOINC tab was added to the Advanced search dialog. Searches can be made based on Code and Label.

LOINC advanced search dialog

The Results are displayed in the Search View.

LOINC search results

LOINC editor

The LOINC editor displays information about a selected LOINC code. Double-click on a code in the LOINC view to open the editor. The editor is grouped in three pages:

Click on the tab at the bottom of the editor to view a page.

LOINC Editor - Overview page

Note: The editor is read-only.

Mapping between SNOMED CT and LOINC

The simple map type reference set can be for one-to-one mappings between SNOMED CT and LOINC.


To map between SNOMED CT and LOINC, you have to create a simple type reference set.

Creating a simple type reference set for mapping SNOMED CT to LOINC

Now you can add members to the reference set.



When mapping from LOINC to SNOMED CT the components, you should use the following settings: Referenced component: LOINC concept Map target type: SNOMED CT concept.

Apart from that the process of mapping is similar to the one described in the section above.

Export delta by effective dates

You can now export delta by any combination of effective dates.

Exporting Delta version

ATC editing

Create new ATC code

To create a new ATC code, go to the ATC navigator, right click the parent, and select Add new child concept.

Creating a new ATC code

This will open the new code in the editor.

Entering an ATC code name
The new ATC code is now visible in the ATC navigator and can also be found in searches.

Note: To avoid confusion, please keep in mind that the ATC Classification system consists of codes and not of concepts such as SNOMED CT. An ATC code is comprised of a code ID and a code label.

Code validation

The code validation prevents you from authoring invalid codes, because errors have to be fixed before saving. An error message in the editor will inform you about the kind of problem. For example, if you make a change to the code ID that is not consistent with the coding format or if the change points to a a different parent than it was created for. Click on the link to go to the respective text field.

ATC code validation

Edit ATC label

The ATC label gives information about the content of a code.

It's also possible to make changes to an existing ATC code.

The new ATC label will appear in the ATC navigator.

Delete ATC code

You can delete an ATC code by right-clicking the code in the ATC navigator and selecting Delete concept. You will be presented with a deletion plan, click Finish to proceed.

Note: ATC editing feature is only available in standalone mode.


This release includes several features related to description logic classification. Note that as these features require additional memory, they are only available when using Snow Owl in collaborative mode with a terminology server.

Classification services now run on the server