> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wrango.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Import an audience

> Upload a CSV of NPIs to create an audience from your own list

Use **Import your own list** when you already know which healthcare professionals you want to reach. This path creates an **Audience** from your own CSV instead of building rules inside Wrango.

## What you can import

The current import flow accepts:

* A `.csv` file.
* A file up to 500 MB.
* A file that includes an **NPI** column.

Wrango only uses the **NPI** column during import. Additional columns are not used by the system.

The current parser accepts common NPI header variations, including:

* `npi`
* `npis`
* `npi id`
* `npi number`
* `national provider identifier`

## Import flow

<Steps>
  <Step title="Start from Create Audience">
    In the **Audiences** dashboard, click **Create Audience**, then choose **Import your own list** and **Begin upload**.
  </Step>

  <Step title="Add audience details">
    Complete **Audience details** first. This step saves the draft **Audience** with its name, description, and **Workspace tags**.
  </Step>

  <Step title="Upload your CSV">
    Move to **Upload CSV** and upload the file. Wrango validates the file, extracts NPIs, and shows the cleaned list before you continue.

    Use **View example file** if you need a sample CSV. The example includes an **NPI** column only, which matches the expected format. Additional columns in your own file are ignored.
  </Step>

  <Step title="Check the preview">
    Continue to **Preview Audience**. Wrango generates a preview from the uploaded NPIs and shows the resulting audience before submission.
  </Step>

  <Step title="Review and process">
    In **Review**, confirm the audience summary and import counts, then click **Finish & process**.
  </Step>
</Steps>

## Validation and file checks

The import step checks the file before you can continue.

* The file must be a CSV.
* The file must include an **NPI** column.
* The file can be up to 500 MB.
* The imported list can include up to roughly one million NPIs.
* Duplicate, empty, or invalid NPIs are ignored during extraction.

If the upload fails validation, update the file and upload it again.

## Field mapping

The current import flow does not expose a manual field-mapping screen. Wrango automatically detects the **NPI** column and creates a cleaned import file from those values only.

## After a successful import

After you click **Finish & process**:

* Wrango submits the **Audience** for processing.
* The success dialog offers **Return to audience dashboard**.
* The imported **Audience** appears in the **Audiences** dashboard.
* Its status moves into processing, then later becomes ready or shows an error if processing fails.

The dashboard will show the imported **Audience** as **Type = Import**.