Core Resources

The clinical resources that form the backbone of any FHIR implementation. How each resource is structured, what it contains, and how it is used in practice.

Observation

Measurements and findings: vital signs, lab results, blood pressure with components, LOINC coding.

LOINCvital-signslaboratorycomponent

Condition

Diagnoses, problems, and clinical findings. Clinical status lifecycle, SNOMED CT and ICD-10 coding.

SNOMED CTICD-10clinicalStatusverificationStatus

Encounter

A patient interaction with a healthcare provider. Status, class (AMB/EMER), period, reason, and participant.

AMBEMERstatusperiod

Search

How to query FHIR servers using URL parameters. Parameter types, modifiers, and searchset Bundles.

tokenstringdatereference_count

Bundle

Container for multiple resources. Transaction atomicity, searchset results, urn:uuid internal references.

transactionsearchsetbatchurn:uuid