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Get a Concept

Retrieve a concept by its OMOP concept ID:

Get by Vocabulary Code

Look up a concept using a vocabulary-specific code:

Batch Get Concepts

Retrieve multiple concepts in a single request (max 100):

Autocomplete Suggestions

Get concept suggestions for autocomplete functionality:

Get Relationships

Get relationships for a concept:
Find concepts related to a given concept:
Get curated concept recommendations using the OHDSI Phoebe algorithm:

Get Complete Hierarchy

Get both ancestors and descendants in a single request:

Hierarchy Get Parameters

Get Ancestors

Find parent concepts in the hierarchy:

Ancestors Parameters

Get Descendants

Find child concepts in the hierarchy:

Descendants Parameters

Get Relationship Types

Get available relationship types from the OMOP CDM:

With Options

Include synonyms, relationships, hierarchy, and specify vocabulary release:

Parameters

Get Concept Relationships

Get detailed relationships for a concept with filtering options:

Relationships Parameters