The Gravity Project

A National Collaborative to Advance Interoperable Social Risk and Protective Factors Documentation

Note that information about this project is being updated on this project page.

The first call for this project will be held May 2, 1pm Pacific/4pm Eastern

(Meeting URL:; Dial In: +1 929 205 6099 US (New York) + 1 669 900 6833 US (San Jose) Meeting ID: 698 090 304).

You may still sign up to participate in the project here.

In the context of mounting interest around collecting and using social risk and protective factor data in health care settings, new challenges have emerged related to the capacity of existing medical terminology standards to effectively capture the necessary data. With funding from the Robert Wood Johnson Foundation and in partnership with EMI Advisors LLC, the Social Interventions Research and Evaluation Network (SIREN) has launched the Gravity Project, a national collaborative effort to help reduce barriers to interoperable social risk and protective factors documentation. Building on previous work funded by Kaiser Permanente, the Gravity Project will:

  1. Develop use cases related to documenting social risk and protective factors data on screening, diagnosis, treatment, and population health management activities;

  2. Identify common data elements and their associated value sets to support the uses cases;
  3. Develop a consensus-based set of code recommendations for capturing and grouping these data elements for interoperable electronic exchange and aggregation; and
  4. Initiate an HL7® Fast Health Interoperability Resource (FHIR®) Implementation Guide based on the defined use cases and associated data sets.

This project will focus on three priority social domains, which were identified based on recommendations from expert advisors, existing literature linking these domains to health, and active local, state, and federal demonstration projects in these areas:

  • Food security;
  • Housing stability and quality; and
  • Transportation access.

Participation in the Gravity Project is open to all interested organizations and individuals. Project participants will meet virtually for one hour once a week. Participants will be asked to comment on project documents through an HL7 Gravity Project Confluence Page (coming soon).

The estimated project timeline is as follows:

  • May 2019: Develop SDH personas and documentation use cases
  • June 2019 to July 2019: Identify and establish consensus on food insecurity data set and value sets
  • July 2019 to August 2019: Identify and establish consensus on housing instability and quality data set and value sets
  • August 2019 to September 2019: Identify and establish consensus on transportation access data set and value sets
  • October 2019 to December 2019: Develop terminology and coding harmonization recommendations

To learn more about the project, please view the following documents:

Also go to the main project webpage.

Links to previous SIREN work on this topic, funded by Kaiser Permanente:

Questions? Contact Lynette Elliott at