# Using the Death register in Atlas
Please follow these instructions to use the Death register in Atlas:
* Click **Add criteria to group** button and select **Add Death.**
The next steps depend on whether you are using [standard or non-standard medical codes](https://docs.finngen.fi/working-in-the-sandbox/which-tools-are-available/atlas/detailed-guide/code-sets-in-atlas) in your Concept Set.
### Using standard codes
* If you are using standard codes, click the button next to the **"a death occurrence from"** text and select your Concept Set.
* Save your cohort using the button.
### Using non-standard codes
* If you are using non-standard codes, first click **Add attribute** button and select **Add Cause of Death Source Concept Criteria**.
* Then click the button next to the **"Death Source Concept is"** text and select your Concept Set.
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* Save your cohort using the button.
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button next to the **"a death occurrence from"** text and select your Concept Set.
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button.
### Using non-standard codes
* If you are using non-standard codes, first click **Add attribute** button and select **Add Cause of Death Source Concept Criteria**.
* Then click the