Patient Demographics Query for mobile (PDQm)
2.2.1 - public-comment

This page is part of the Patient Demographics Query for Mobile (v2.2.1: Public Comment Ballot 1) based on FHIR R4. This is the current published version. For a full list of available versions, see the Directory of published versions

1:38. Patient Demographics Query for Mobile

The Patient Demographics Query for Mobile (PDQm) Profile defines a lightweight RESTful interface to a patient demographics supplier leveraging technologies readily available to mobile applications and lightweight browser based applications.

The functionality is similar to the PDQ and PDQv3 Profiles. The differences are driven by the use of HL7 FHIR. The profile leverages HTTP transport, and the JavaScript Object Notation (JSON), Simple-XML, and Representational State Transfer (REST). The payload format is defined by the HL7 FHIR standard.

The following list provides a few examples of how PDQm might be leveraged by implementers:

  • A health portal securely exposing demographics data to browser-based plugins
  • Medical devices which need to access patient demographic information
  • Mobile devices used by physicians (example bedside eCharts) which need to establish patient context by scanning a bracelet
  • Web based EHR/EMR applications which wish to provide dynamic updates of patient demographic information such as a non-postback search, additional demographic detail, etc.
  • Any low resource application which exposes patient demographic search functionality
  • Any application using the MHD Profile to access documents may use PDQm to find an appropriate patient identifier

This implementation guide is intended to be fully compliant with the HL7 FHIR specification, providing only use-case driven constraints to aid with interoperability, deterministic results, and compatibility with existing PDQ and PDQv3 Profiles.

Organization of This Guide

This guide is organized into three main sections:

  1. Volume 1: Use-Case analysis
    1. 38.1 PDQm Actors and Transactions
    2. 38.2 PDQm Actor Options
    3. 38.3 PDQm Required Groupings
    4. 38.4 PDQm Overview
    5. 38.5 PDQm Security Considerations
    6. 38.6 PDQm Cross-Profile Considerations
  2. Volume 2: Transaction Detail
    1. 3.78 Mobile Patient Demographics Query [ITI-78]
  3. Test Plan

Click on any of the links above, head on over the table of contents, or if you are looking for a specific artifact, check out the index.

Must Support

PDQm uses Must Support in StructureDefinition profiles. This is equivalent to the IHE use of R2 as defined in Appendix Z.


You can also download:

The source code for this Implementation Guide can be found on IHE GitHub