OMOPHub

OMOPHub provides a managed vocabulary platform for healthcare data teams working with OMOP, FHIR, and healthcare AI. The platform delivers access to over 11 million standardized concepts across more than 120 terminologies through a single API, removing the need for teams to host, update, or maintain vocabulary infrastructure themselves. It serves research groups, ETL developers, real-world evidence and health economics and outcomes research teams, and AI product builders — spanning academic ETL projects through to LLM-driven clinical analysis in industry.

The platform was created in response to growing OHDSI and OMOP adoption globally, where the infrastructure layer around vocabularies remained difficult to operate, integrate, and scale. OMOPHub positions medical vocabularies — foundational to code lists, cohort definitions, real-world evidence studies, and AI-driven clinical workflows — as a continuously maintained platform rather than a collection of downloads, scheduled jobs, and private forks.

Available Products and Modules

• REST API: Access to 11M+ standardized concepts across 120+ terminologies, available at api.omophub.com.
• Semantic Search: Concept discovery using natural language queries, backed by hosted embeddings, enabling users to find the relevant concept without knowing the exact code.
• Python, R, and Node.js SDKs: Typed client libraries distributed via PyPI, CRAN, and NPM, designed for use in scripting, notebooks, ETL pipelines, and native OHDSI analytics workflows.
• MCP Server for AI Agents: A hosted Model Context Protocol server accessible via a single URL and API key, compatible with tools including Claude, Cursor, VS Code, and Windsurf.
• FHIR to OMOP Resolver: A single-call endpoint (POST /fhir/resolve) that resolves a FHIR Coding to its corresponding OMOP standard concept and target Common Data Model table.
• FHIR Terminology Service: CodeSystem and ValueSet endpoints for FHIR-native applications, supporting FHIR versions R4, R4B, R5, and R6.

Core Capabilities

• Unified access to the full OMOP vocabulary stack through a single managed API, without requiring teams to operate their own vocabulary infrastructure.
• Continuous vocabulary updates managed by OMOPHub, so teams do not need to track or apply updates themselves.
• Cross-language SDK support enabling integration into diverse development environments and data workflows.
• Semantic concept search using hosted embeddings to support exploratory and AI-driven use cases.
• FHIR interoperability through both a resolver endpoint and a full FHIR terminology service spanning multiple specification versions.
• AI agent integration via a hosted MCP server, connecting vocabulary data directly into LLM-based development and analysis tools.

Deployment, Customers, and Roadmap

• Delivered as SaaS with no infrastructure to maintain on the customer side; access is provided via an API key.
• More than 400 teams currently build with OMOPHub across research, ETL, RWE/HEOR, and AI product development contexts.
• Used in pipelines preparing for European Health Data Space secondary use, where OMOP CDM is the recommended semantic standard.
• Collaborative Code Lists are on the roadmap, intended to provide shared cohort definitions with version control and audit trails, reducing duplicated work across teams currently managing cohort logic in private spreadsheets.
• Founded by Alex Chen, the company operates as a small, focused team with an emphasis on fast APIs, reliable data, clear documentation, and deliberate product scope.