> For the complete documentation index, see [llms.txt](https://guides.ohie.org/arch-spec/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.ohie.org/arch-spec/main-1/introduction/patient-identity-management-workflows/query-patient-demographic-records-by-identifier-workflow.md).

# Query Patient Demographic Records by Identifier Workflow

## Overview

This transaction allows patient demographics to be fetched from the Client Registry using an identifier. The following sequence diagram shows the steps involved.

| **Workflow Maturity**         | <p><img src="https://lh5.googleusercontent.com/Vp6XBRGu-U_Dmd5EKNpCZvEEum0CxOcHOj9NgHh8UMMNLMlXHmLcUE_YWueDRr4uqWLzpPfzSBLJ2k33XQIelLypjQ4wyrD17-t33GtLa8fFxW9AYDvXhiJmBl4VaLgKDg" alt=""></p><p>    <strong>Mature</strong></p> | <p></p><ul><li><strong>One or more OpenHIE implementations of this workflow exist  in one or more countries</strong></li><li><strong>Workflow is defined and ARB approved</strong></li><li><strong>Workflow is supported by mature standards</strong></li></ul>                                                                                                                                                                                           |
| ----------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Standards\*                   |                                                                                                                                                                                                                                  | <p></p><ul><li><p>Option 1 </p><ul><li><a href="https://profiles.ihe.net/ITI/TF/Volume2/ITI-21.html">QBP^Q22 - IHE ITI-21</a></li><li><a href="https://profiles.ihe.net/ITI/TF/Volume2/ITI-21.html">RSP^K22 - IHE ITI-21</a></li></ul></li><li><p>Option 2</p><ul><li>FHIR - <a href="http://ihe.net/uploadedFiles/Documents/ITI/IHE_ITI_Suppl_PDQm_Rev1.0_PC_2014-06-06.pdf">Patient Demographics Query IHE ITI PDQm Transaction</a></li></ul></li></ul> |
| Assumptions and Prerequisites |                                                                                                                                                                                                                                  | The PoS system is a trusted application known by the HIE and it is registered with the interoperability layer to be able to send and receive data securely ([Common message security workflow](https://wiki.ohie.org/display/documents/Common+message+security+workflow)).                                                                                                                                                                                |
| Actors                        |                                                                                                                                                                                                                                  | <p></p><ul><li>PoS - The point of service system that captures patient identifiers, is responsible for sending the identifiers to the HIE.</li><li>IL - Mediates the transactions between the PoS system and the client registry.</li><li>CR - Manages patient demographics and identifier details.</li></ul>                                                                                                                                             |

## **Interaction Description**&#x20;

The following is a description of the interaction steps.

![](https://lh4.googleusercontent.com/E7KhcHt2R43LmqTGoZdoOa9aL-Oek0lKdOOZrsF8LUc8kM1Edo7FzujmTK9wNstLUpXKLcG7QfQ8IWP8gMQK45nbXYxvSetQ49irKJ_sk7aJxF_r8nlkYAKYB-dkot0B2Q)

| # | Interaction                       | Data                                                                                                                             | Transaction Options                                                                                                                                                                                                                                                                                                                                    |
| - | --------------------------------- | -------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 1 | Get patient by identifier         | The message includes the query criteria, which may include one or more patient identifiers.                                      | <p></p><ul><li><a href="https://wiki.ohie.org/display/documents/Patient+Demographics+Query+IHE+ITI-21+Transaction">PDQ ITI-21 transaction QBP-Q22</a>    </li></ul><p>OR</p><ul><li><a href="http://ihe.net/uploadedFiles/Documents/ITI/IHE_ITI_Suppl_PDQm_Rev1.0_PC_2014-06-06.pdf">Patient Demographics Query IHE ITI PDQm Transaction</a></li></ul> |
| 2 | Get patient from CR by identifier | The message from the PoS is passed directly through to the CR by the IL                                                          | <p></p><ul><li><a href="https://wiki.ohie.org/display/documents/Patient+Demographics+Query+IHE+ITI-21+Transaction">PDQ ITI-21 transaction QBP-Q22</a>    </li></ul><p>OR</p><ul><li><a href="http://ihe.net/uploadedFiles/Documents/ITI/IHE_ITI_Suppl_PDQm_Rev1.0_PC_2014-06-06.pdf">Patient Demographics Query IHE ITI PDQm Transaction</a></li></ul> |
| 3 | Return patient record             | The response returns the patient(s) that matched the query criteria. It may consist of zero or more patient demographic records. | <p></p><ul><li><a href="https://wiki.ohie.org/display/documents/Patient+Demographics+Query+IHE+ITI-21+Transaction">PDQ ITI-21 transaction RSP-K22</a></li></ul><p>OR</p><ul><li>Query Patient Resource Response (<a href="https://www.ihe.net/uploadedFiles/Documents/ITI/IHE_ITI_TF_Vol2a.pdf">ITI TF-2</a>c:3.Y1.4.2): Bundle (Patient)</li></ul>    |
| 4 | Return patient record             | The message from the CR is passed directly through to the PoS by the IL                                                          | <p></p><ul><li><a href="https://wiki.ohie.org/display/documents/Patient+Demographics+Query+IHE+ITI-21+Transaction">PDQ ITI-21 transaction RSP-K22</a></li></ul><p>OR</p><ul><li>Query Patient Resource Response (<a href="https://www.ihe.net/uploadedFiles/Documents/ITI/IHE_ITI_TF_Vol2a.pdf">ITI TF</a>-2c:3.Y1.4.2): Bundle (Patient)</li></ul>    |

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