Our Mission

The Gravity Project exists to serve as the open public collaborative advancing health and social data standardization for health equity.

Who We Are

The idea for the Gravity Project originated in 2017, following a multi-stakeholder meeting convened by the Social Interventions Research & Evaluation Network (SIREN). The group championed a grassroots approach for creating a collaborative that could build social needs data for integration in clinical care.

Today our members advance and promote equitable health and social care by leading the development and validation of consensus-driven interoperability standards on social determinants of health.

Our Goal

Build and promulgate consensus driven social determinants of health (SDOH) data standards for health and social care interoperability and use among multi-stakeholders.

Reaching our Goal Together

The Gravity Project empowers members to determine the projects on which the collaborative will work. Members decide upon projects according to a series of core criteria.

Gravity Project Workstreams

Gravity Project activities and outputs are managed under one of three workstreams: Terminology, Technical, and Pilots.

The goal of the terminology workstream is to create words and respective meanings for social risk and social needs so they can be applied and understood across the health and human services ecosystem. The terminology workstream collectively crafts a representative data set for each social risk domain. The Gravity Project divides each data set into four activities–screening, diagnosis, goal setting, and interventions–in order to represent clinical processes and associated coded terminologies.

The technical workstream expands available social determinants of health (SDOH) data within electronic systems for interoperability and accelerates standards-based information exchange using HL7® Fast Healthcare Interoperability Resources (FHIR®). The technical workstream addresses the question of how to record, document, and exchange SDOH information across the health and human services ecosystem and across the four primary activities of care, while promoting individual privacy, safety, security, and accountability for patient records.

The pilots worksteam is facilitated through a peer-to-peer Pilots Affinity Group where entities are invited to test evolving Gravity Project terminology and data exchange standards and share lessons learned with each other. The goal is to validate the use of Gravity-identified coded terminologies and FHIR Implementation Guides through real-world testing across clinical, social services, payer, and government electronic systems.

Project Selection Criteria

Multi-Stakeholder Benefit

Does the work create value for each of the six Gravity stakeholder groups?


Are the right policies in place to support this work? If not, are there challenges to create/implement new policy?

Human Capacity

Do we have the right people/skills/bandwidth to develop and inform this work?

Technical Capacity

Do we have the infrastructure to support the development/ implementation of new technical capabilities?

Financial Capacity

What will the work cost and do we have sustainable funding and in-kind support?

Testing & Validation Capacity

Can the work be easily tested and piloted in the field and is there a feedback process?


Can the work easily integrate into existing and upcoming initiatives?

Cross-Sector Buy-In

Will this work be supported by the health and social care service systems?


Are there similar projects doing the same work?


What are the risks to execute the work and can user burden be mitigated?

Strength in Collaboration

Join us in working toward the shared goal of health equity across cultural, institutional, and social contexts.