is a 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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| ID | Name | URL | Category | Format | Description |
|---|---|---|---|---|---|
| imo-knowledge-graph.data ⚠ | IMO Health Knowledge Graph Content | knowledge-graph | Product | http | The proprietary clinical knowledge gr... |
| imo-knowledge-graph.graphql_api ⚠ | IMO Health Knowledge Graph GraphQL API | knowledge-graph | ProgrammingInterface | graphql | GraphQL API providing direct query ac... |
| imo-knowledge-graph.mcp_server ⚠ | IMO Health MCP Server | mcp-server | ProgrammingInterface | http | Model Context Protocol server that ex... |
| imo-knowledge-graph.terminology_server_api | IMO Health Terminology Server API | terminology-server-api | ProgrammingInterface | http | Terminology Server API providing endp... |
| imo-knowledge-graph.crosswalks_api | IMO Health Crosswalks API | crosswalks | ProgrammingInterface | http | Crosswalks API supporting creation, u... |
| imo-knowledge-graph.value_sets_api | IMO Precision Sets Value Sets GraphQL API | value-sets-graphql | ProgrammingInterface | graphql | GraphQL API for searching, creating, ... |
| imo-knowledge-graph.covid19_open_data ⚠ | IMO Open Source COVID-19 Terminology and Value Set Data Package | CT-NA-200506-Open-source-terminology-and-value-set-data-COVID-19-01-Landing-page.html | Product | http | Open source data package of IMO clini... |
| imo-knowledge-graph.code_samples ⚠ | IMO Health API Integration Code Samples | imohealth | Product | python | Public GitHub repositories from IMO H... |
| imo-knowledge-graph.developer_portal ⚠ | IMO Developer Portal | developer.imohealth.com | DocumentationProduct | http | IMO Developer Portal with the API cat... |
| imo-knowledge-graph.documentation | IMO Health Knowledge Graph Product Page | knowledge-graph | DocumentationProduct | http | Product page describing the IMO Healt... |
The IMO Health Knowledge Graph is the clinical context layer underlying IMO Health’s commercial terminology and clinical AI products. IMO Health, founded in 1994 as Intelligent Medical Objects and headquartered in Rosemont, Illinois, develops and licenses clinical interface terminology: the clinician-facing problem, procedure, and lab terms that sit between free-text documentation and administrative code sets.
The graph organizes those terms into concept hierarchies, clinical relationships, and cross-maps to standard vocabularies. IMO describes it as containing millions of concepts, relationships, and mappings derived from real-world clinical data and maintained by a team of clinical informaticists and coding experts, with continuous updates to track evolving coding standards and regulatory requirements.
Unlike most entries in this registry, this is a proprietary resource. There is no public dump, no open SPARQL or Cypher endpoint, and no openly licensed release of the graph. The entry is included to document what is known about its scope, its access paths, and the small number of publicly available artifacts associated with it.
In April 2026 IMO Health opened direct developer access to the graph. Two access paths are documented on the IMO Developer Portal:
api.imohealth.com/mcp that exposes graph traversal
(get_relationships, get_hierarchy, cross_map), normalization, and search
operations as tools for AI agents. Authentication is by JWT bearer token.Both require credentials issued under a commercial agreement. The broader API catalog also includes a Terminology Server API, a Crosswalks API, a Value Sets (Precision Sets) GraphQL API, a Coding Intelligence API, and clinical NLP services for context-aware extraction and de-identification.
Public resources associated with IMO Health are limited:
Normalize-Samples, snowflake-normalize-integration,
NLP-sample, solution-accelerators) rather than data. None declare a license.http://imohealth.com/ontology/, OID urn:oid:2.16.840.1.113883.3.247), which
identifies IMO as a clinical interface terminology for FHIR and related standards
but does not distribute its content.The graph cross-maps IMO’s interface terminology to ICD-10-CM, ICD-9-CM, ICD-10-PCS, SNOMED CT, CPT, HCPCS, LOINC, RxNorm, and NDC. Several of these are separately registered in KG-Registry and are recorded as secondary sources of the graph content.
Created: July 30, 2026 | Last modified: July 30, 2026