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

# Overview

> Overview of the walk-in test modality where patients visit a laboratory Patient Service Center to have their blood drawn.

Walk-in tests are one of our offered modalities.
This modality is focused on patients that are able to go to a Laboratory to have their blood drawn.

## Ordering Flow overview

To achieve this, a high-level overview of the process is defined as:

* An order is placed in Junction's system through our Dashboard or API.
* The order is added to a background queue and additional checks are made before a test requisition is created with the chosen Laboratory.
* After the requisition is created, some form of communication is carried out with the patient so they can go to the assigned partner Laboratory.
* After that, the patient can go at any time they want to the laboratory to have their blood drawn.
* The Laboratory processes the patient's blood sample and generates the required results.
* Junction exposes the results as soon as they are available, both as PDF and structured data via API.

To find out more details, see [`Order Lifecycle`](/lab/walk-in/order-lifecycle), [`Communications`](/lab/walk-in/communications) and [`Webhooks`](/lab/walk-in/webhooks).