Labs & Imaging

Lab orders and imaging results in FHIR follow a request-and-report pattern. A ServiceRequest represents the order, and a DiagnosticReport captures the results. Individual measurements are stored as Observation resources linked to the report.

Key Resources

Resource	Description
ServiceRequest	A record of an order for services such as diagnostic investigations, treatments, or operations to be performed.
DiagnosticReport	The findings and interpretations of diagnostic tests performed on a patient.
Specimen	A record of a sample to be used for analysis.
Observation	A structured representation of measurements and simple assertions made about a Patient.

Key Code Systems

Code System	Description
UCUM	Used to define measurement units on a Specimen resource.
ICD-10	Used to annotate Observation resources for tracking.
SNOMED	Used to define Specimen types and retrieval methods.
LOINC	Used to annotate Observation resources for tracking.