This code system http://hl7.org/fhir/us/core/CodeSystem/us-core-observation-category defines the following codes:

CodeDisplayDefinition
clinical-test Clinical TestIncludes non-imaging and non-laboratory tests performed on a patient that results in structured or unstructured (narrative) findings specific to the patient, such as electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT), to facilitate the diagnosis and management of conditions.
 <status value="active"/> <date value="2022-04-07"/> <publisher value="HL7 International - Cross-Group Projects"/> <contact> <name value="HL7 International - Cross-Group Projects"/> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/cgp"/> </telecom> <telecom> <system value="email"/> <value value="cgp@lists.HL7.org"/> </telecom> </contact> <description value="Set of codes for implementation of the US-Core profiles. These codes are extensions to the [FHIR Observation Category Codes](http://terminology.hl7.org/CodeSystem/observation-category)."/> <jurisdiction> <coding> <system value="urn:iso:std:iso:3166"/> <code value="US"/> </coding> </jurisdiction> <copyright value="Used by permission of HL7 International, all rights reserved Creative Commons License"/> <caseSensitive value="true"/> <content value="complete"/> <count value="1"/> <concept> <code value="clinical-test"/> <display value="Clinical Test"/> <definition value="Includes non-imaging and non-laboratory tests performed on a patient that results in structured or unstructured (narrative) findings specific to the patient, such as electrocardiogram (ECG), visual acuity exam, macular exam, or graded exercise testing (GXT), to facilitate the diagnosis and management of conditions."/> </concept> </CodeSystem>