Lookup
Lookup API provides facility to find information about SNOMED CT Concept.
Concept -
Description - Retrieves the concept details including descriptions and relationships for specified Concept ID and language refset (us/uk).
Parameters -

- id
- langrefset

Example -
This will return details for concept 38082009 | Hemoglobin (substance) |
Relationship -
Description - Retrieves all the related Concept IDs for a particular Concept ID based on the specified relationship type (is a / finding site / causative agent / has intent / procedure site / specimen substance / associated finding / associated with / associated morphology / has active ingredient and so on) and the direction (source / destination).
Parameters -

- id
- relation
- direction

Example -
This URL will return results for all 'is a' relationship of the source concept 22298006 | Myocardial infarction (disorder) |