In a previous post, I mentioned a basic intro of HL7 FHIR and FHIR Server. Like many of the healthcare data model standards, called FHIR resources, CodeSystem is used for implementing terminology, classifications, ontology etc. That means you can create of any subset of existing terminology database for your needs. For example, you can use SNOMED CT (modified by your needs) and can use with the FHIR server via CodeSystem resources.
Logical Observation Identifiers Names and Codes (LOINC) is a database and universal standard for identifying medical laboratory observations, health measurements, and documents. LOINC is distributed by various downloadable formats. Here is a great news. LOINC announced a public beta service of its database by using FHIR Server. Now you can access of all LOINC resources via their FHIR API. But for this, you need a free membership of LOINC as you probably had for accessing their other services like web-based search tool.
Possible use case: You don’t have to download and implement LOINC to your system but you can programmatically access their content and implement them to your system. Cool!