IMO Health Knowledge Graph
The IMO Health Knowledge Graph is a commercial clinical knowledge graph developed by IMO Health (formerly Intelligent Medical Objects) that links clinical language, concepts, and codes into a shared context layer for healthcare data. It is built on IMO's clinical interface terminology, curated since 1994 by clinical informaticists and coding specialists, and contains millions of concepts, relationships, and cross-mappings derived from real-world clinical documentation. The graph encodes concept hierarchies, clinical relationships, and cross-maps among standard code systems including ICD-10-CM, ICD-9-CM, ICD-10-PCS, SNOMED CT, CPT, HCPCS, LOINC, RxNorm, and NDC. IMO reports that the underlying terminology is used by more than 90% of U.S. clinicians across 4,500+ provider organizations and every major EHR, and that it supports roughly 12 billion terminology search transactions per year. In April 2026 IMO Health opened direct developer access to the graph through a GraphQL API and a Model Context Protocol (MCP) server that exposes graph traversal, hierarchy, and cross-mapping operations as tools for AI agents. The graph itself is proprietary, and access requires a commercial license and credentials; no public bulk download or open query endpoint is available.
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Authentication uses a JWT bearer token.", "format": "http", "id": "imo-knowledge-graph.mcp_server", "is_public": false, "name": "IMO Health MCP Server", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "imo-knowledge-graph"}], "product_url": "https://developer.imohealth.com/mcp-server", "warnings": ["Requires IMO Health credentials and a JWT token; the server is not openly accessible."]}, {"category": "ProgrammingInterface", "description": "Terminology Server API providing endpoints for ingesting, searching, and managing healthcare terminology datasets backed by the IMO Health Knowledge Graph, with licensing controls on the underlying content.", "format": "http", "id": "imo-knowledge-graph.terminology_server_api", "is_public": false, "name": "IMO Health Terminology Server API", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "imo-knowledge-graph"}], "product_url": "https://developer.imohealth.com/api-catalog/terminology-server-api"}, {"category": "ProgrammingInterface", "description": "Crosswalks API supporting creation, update, deletion, and search of mappings from multiple source codes to target codes within or across code systems, drawing on the cross-mappings maintained in the IMO Health Knowledge Graph.", "format": "http", "id": "imo-knowledge-graph.crosswalks_api", "is_public": false, "name": "IMO Health Crosswalks API", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "imo-knowledge-graph"}], "product_url": "https://developer.imohealth.com/api-catalog/crosswalks"}, {"category": "ProgrammingInterface", "description": "GraphQL API for searching, creating, and retrieving IMO Precision Sets, pre-built clinical value sets assembled from the IMO Health Knowledge Graph that isolate codes across ICD-10-CM, ICD-9-CM, SNOMED CT, CPT, LOINC, NDC, and RxNorm for cohort identification, clinical decision support, and reporting. 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The graph encodes concept hierarchies, clinical relationships, and cross-maps among standard code systems including ICD-10-CM, ICD-9-CM, ICD-10-PCS, SNOMED CT, CPT, HCPCS, LOINC, RxNorm, and NDC. IMO reports that the underlying terminology is used by more than 90% of U.S. clinicians across 4,500+ provider organizations and every major EHR, and that it supports roughly 12 billion terminology search transactions per year. In April 2026 IMO Health opened direct developer access to the graph through a GraphQL API and a Model Context Protocol (MCP) server that exposes graph traversal, hierarchy, and cross-mapping operations as tools for AI agents. 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