This code system http://hl7.org/fhir/us/cdmh/CodeSystem/pcornet-result-loc defines the following codes:

CodeDisplayDefinition
L LabLocation of the test result is Lab.
P Point of CarePoint of Care locations may include anticoagulation clinic, newborn nursery, finger stick in provider office, or home.
NI No informationLocation of the test result has No information.
UN UnknownLocation of the test result is Unknown.
OT OtherLocation of the test result is Other.
 <status value="active"/> <date value="2021-09-06"/> <publisher value="HL7 International - Biomedical Research and Regulation Work Group"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/Special/committees/rcrim"/> </telecom> </contact> <description value="The PCORNet Result Location contains the codes to be used by PCORNet data marts."/> <jurisdiction> <coding> <system value="urn:iso:std:iso:3166"/> <code value="US"/> </coding> </jurisdiction> <copyright value="Used by permission of HL7, all rights reserved Creative Commons License"/> <caseSensitive value="true"/> <content value="complete"/> <count value="5"/> <concept> <code value="L"/> <display value="Lab"/> <definition value="Location of the test result is Lab."/> </concept> <concept> <code value="P"/> <display value="Point of Care"/> <definition value="Point of Care locations may include anticoagulation clinic, newborn nursery, finger stick in provider office, or home."/> </concept> <concept> <code value="NI"/> <display value="No information"/> <definition value="Location of the test result has No information."/> </concept> <concept> <code value="UN"/> <display value="Unknown"/> <definition value="Location of the test result is Unknown."/> </concept> <concept> <code value="OT"/> <display value="Other"/> <definition value="Location of the test result is Other."/> </concept> </CodeSystem>