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Short Description

Review and test aspects of the ONC FAST National Directory effort 

Long Description

Review of the existing implementation guides that are part of input into the FAST Directory solution.  The existing implementation guides include the National Directory Exchange IG, the Endpoint Query IG and the Attestation and Validation IG. The FAST solution document outlines the direction that will be taken in creating the three new IGs that are part of the National Directory work effort at HL7.

The goal of the project is to create FHIR based standards for:

1) The exchange of validated healthcare directory information in a federated access environment based on the Validated Healthcare Directory standard localized for the US Realm using work completed for the PDex Plan Net FHIR IG (includes 11-14 in drawing below),

2) Query for FHIR endpoints from any federated directory instance (includes 15-16 in the drawing below), and

3) Submitting attested information to the validated directory and verifying the information against primary sources (includes 1-10 in drawing below).

This project is needed to provide standards for the population, validation, exchange and query of a federated access national healthcare directory.  It will:

  1. Minimize the burden on providers in supplying this information to multiple payers, healthcare organizations, and professional societies
  2. Improve the quality of demographic and relationship information associated with healthcare organizations and individuals,
  3. Provide a reliable source of electronic endpoints to facilitate the exchange of healthcare information (e.g. patient records and referrals).  In particular, the standards will facilitate the creation, population, and use of a national resource to support the scaling of FHIR based exchanges to support more efficient and better informed delivery of health care services.

Project Page:


Review initial implementation guide work and test associated reference implementations and third party software

Submitting Work Group/Project/Accelerator/Affiliate/Implementer Group  

Patient Administration / FAST Directory Task Force

Track Lead(s)

Track Lead Email(s);;

Related Tracks

2022-05 Da Vinci Payer Data Exchange Formulary and Plan-Net

2022-05 FAST Security & Identity

FHIR Version


Specification(s) this track uses

The FAST Directory Track will use both of the following IG as reference information

National Directory Exchange FHIR IG:

National Directory Endpoint Query FHIR IG:

National Directory Attestation and Validation FHIR IG:

Reference Implementations:

PDex Plan Net Reference Implementation

National Directory Directory Reference Implementation (Validation / Attestation / UDAP)

Artifacts of focus

Endpoint resource

Expected participants

Payers and Providers interested in using an endpoint directory to facilitate implementing the CMS and ONC final rules

Zulip stream

Zulip stream for comments and questions regarding the ONC FAST Directory Track

Track Kick Off Call

Monday April 25, 2022 3:00-4:00 PM EST

Webmeeting Info:

Meeting ID: 985 1733 4633

Dial by your location

        +1 669 900 6833 US (San Jose)

        +1 253 215 8782 US (Tacoma)

        +1 346 248 7799 US (Houston)

        +1 929 436 2866 US (New York)

        +1 301 715 8592 US (Washington DC)

        +1 312 626 6799 US (Chicago)


Kickoff Recording: GMT20220425-190948_Recording_1920x1080.mp4

Track Agenda

May 3 Agenda

  • 09:00 AM – 09:30 AM Eastern
    • Kick off, agenda review, Connectathon objectives, Connectathon operations (Robert Dieterle)
  • 09:30 AM – 10:30 AM Eastern 
    • Review of National Directory IGs and RI
  • 10:30 AM – 3:00 PM Eastern
    • Break / Lunch
  • 3:00 PM – 4:00 PM Eastern
    • Breakout:
    • Cross-over Topics with FAST Security, Identity, Directory

May 4 Agenda

  • 10:00 AM – 10:30 AM Eastern
    • Review Prior Day
  • 10:30 AM – 2:30 PM Eastern
    • National Directory US Realm: Test Exchange, Endpoint Query, and Attestation and Validation Standards
  • 2:30 PM – 3:30 PM Eastern 
    • Report Out
  • 3:30 PM – 4:30 PM Eastern 
    • Breakout:
    • Cross-over Topics with FAST Security, Identity, Directory

Track Details

Role 1 Name: Federated Directory Actor

Role 2 Name: Application Query Actor


Query the Federated Directory for a specific endpoint based on the name or ID of a payer organization

Scenario Step 1 Connect to Federated Directory API endpoint

Action: Authenticate to Federated Directory Endpoint

Success Criteria:  ability to access a Federated Directory API 

Scenario Step 2 Query for endpoint information for a specific Payer

Action: RESTful GET of endpoint information for a specific Payer organization

Success Criteria:  ability to return endpoint information for a specific payer organization

Scenario Step 3 Query Bulk Data endpoint 

Action: RESTful GET of streaming NDJSON file 

Success Criteria:  ability to return bulk data stream for a specific resource

Stretch Goal:  ability to query NDJSON bulk data from IPFS or BitTorrent 


Security and Privacy Considerations:

FAST UDAP Security protocols required for some use case exchanges.