More Info
We also suggest you review HL7's documentation regarding LOINC terminology, 4.2.3 Using LOINC with FHIR. Furthermore, the LOINC Users' Guide can help you understand all the intricacies of the LOINC code system.
You may also post questions and feedback in our User Forum for this server.
Canonical URI for LOINC in FHIR
http://loinc.org
Canonical definition for LOINC as a CodeSystem in FHIR
https://loinc.org/fhir/loinc.xml
REST endpoint base
The following endpoints omit this base for brevity.
https://fhir.loinc.org
CodeSystem endpoint
Returns all information about LOINC as a CodeSystem.
/CodeSystem/?url=http://loinc.org
Identifier lookup operation
May be used on a LOINC term, Part, Answer List, or Answer.
/CodeSystem/$lookup?system=http://loinc.org&code={LOINC identifier}
Lookup specific property
Indicate particular property(ies) for an identifier
/CodeSystem/$lookup?system=http://loinc.org&code={LOINC identifier}&&property={Property}[&&property={Property}]
ValueSet endpoint
Returns entire ValueSet resource including all available value sets, definition criteria, etc.
/ValueSet
Specific ValueSet
Returns the ValueSet resource for the identified Answer List, LOINC Group, or general collection of LOINC terms.
/ValueSet/?url=http://loinc.org/vs/{LOINC identifier}
/ValueSet/{LOINC identifier}
Expand ValueSet operation
Returns the expansion for given ValueSet.
/ValueSet/$expand?url=http://loinc.org/vs/{LOINC ValueSet identifier}
Validate term in given ValueSet
Returns boolean true if term exists in given ValueSet.
/ValueSet/{LOINC ValueSet}/$validate-code?system=http://loinc.org&code={LOINC identifier}
ConceptMap endpoint
Returns all available LOINC concept mappings, metadata, mappings, and canonical URIs.
/ConceptMap
Specific ConceptMap
Returns the ConceptMap resource for identified set.
/ConceptMap/?url={Canonical LOINC ConceptMap URI}
Translate operation
Return available mapping(s) for identified LOINC source term.
/ConceptMap/$translate?system=http://loinc.org&code={LOINC identifier}
Questionnaire endpoint
Returns all forms available within LOINC.
/Questionnaire
Specific Questionnaire
Returns the Questionnaire resource for the identified term.
/Questionnaire/?url=http://loinc.org/q/{LOINC identifier}