> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/snomed-ct-user-guides/simplex-user-guide/how-to..../set-up-an-extension-in-simplex.md). # Set up an Extension in Simplex | Steps | Description | References | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- | |

1. Reach out to the Implementation Support Team

| To begin using Simplex, the initial setup must be managed by the SNOMED International Implementation Support Team. Follow these steps to get started: | |

Steps	Description
1. Reach out to the Implementation Support Team Contact the Support Team : Email the Implementation Support Team at implementation@snomed.org to express your interest in using Simplex.	To begin using Simplex, the initial setup must be managed by the SNOMED International Implementation Support Team. Follow these steps to get started: Contact the Support Team: Email the Implementation Support Team at implementation@snomed.org to express your interest in using Simplex. Await Response: The team will respond as soon as possible to assist you with the initial setup. Prepare for Setup: While waiting for a response, you can prepare by completing the tasks outlined below.
2. Aquire a namespace	Before creating an extension, you must obtain a unique namespace identifier from SNOMED International. Follow these steps: Access the Application Form: Visit the Use SNOMED CT page to access the application form and namespace register. Submit the Application: Complete and submit the application form as directed. Receive the Identifier: Once issued, your 7-digit namespace identifier will allow your organization to generate globally unique SCTIDs for your extension components.
3. Determine the module for your extension	Modules in SNOMED CT are used to organize content for maintenance and publication. Follow these steps to determine the name of your module: Understand Module Requirements: Ensure that all concepts, descriptions, relationships, and reference set members you create will belong to this module. Select a Descriptive Name: Choose a name that clearly represents the content and purpose of your module. Forward the Module Name: Once the Implementation Support Team confirms the setup of your extension, forward the chosen module name to them for approval. This ensures that your module is correctly registered and maintained by your organization.

Steps

Description

1. Reach out to the Implementation Support Team

Contact the Support Team : Email the Implementation Support Team at implementation@snomed.org to express your interest in using Simplex.

To begin using Simplex, the initial setup must be managed by the SNOMED International Implementation Support Team. Follow these steps to get started:

Contact the Support Team: Email the Implementation Support Team at implementation@snomed.org to express your interest in using Simplex.
Await Response: The team will respond as soon as possible to assist you with the initial setup.
Prepare for Setup: While waiting for a response, you can prepare by completing the tasks outlined below.

2. Aquire a namespace

Before creating an extension, you must obtain a unique namespace identifier from SNOMED International. Follow these steps:

Access the Application Form: Visit the Use SNOMED CT page to access the application form and namespace register.
Submit the Application: Complete and submit the application form as directed.
Receive the Identifier: Once issued, your 7-digit namespace identifier will allow your organization to generate globally unique SCTIDs for your extension components.

3. Determine the module for your extension

Modules in SNOMED CT are used to organize content for maintenance and publication. Follow these steps to determine the name of your module:

Understand Module Requirements: Ensure that all concepts, descriptions, relationships, and reference set members you create will belong to this module.
Select a Descriptive Name: Choose a name that clearly represents the content and purpose of your module.
Forward the Module Name: Once the Implementation Support Team confirms the setup of your extension, forward the chosen module name to them for approval.

This ensures that your module is correctly registered and maintained by your organization.

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