📄️ Quickstart
Translate FHIR clinical codes to OMOP concept IDs and populate CDM columns using Echidna — a step-by-step recipe with copy-paste curl examples.
📄️ Try It
Paste a FHIR resource, or pick a system and enter a code, and watch Echidna translate it into OMOP concept IDs and CDM columns live, step by step.
📄️ Source vs. Standard Concepts
Understand when $translate returns a source concept vs a standard concept, how the Maps to relationship connects them, and when to use the OmopMapsTo shortcut.
📄️ Values and Qualifiers
Some FHIR source codes map to multiple OMOP concepts — a primary concept and one or more value/qualifier concepts. This page shows how to detect and handle them using $lookup.
📄️ OMOP to FHIR
Translate an OMOP concept ID back to its FHIR source codes using the OmopMappedFrom computed ConceptMap and $expand vocabulary filters.