This code system http://terminology.hl7.org/CodeSystem/processpriority defines the following codes:

CodeDisplayDefinition
stat ImmediateImmediately in real time.
normal NormalWith best effort.
deferred DeferredLater, when possible.
 <status value="draft"/> <experimental value="false"/> <date value="2023-02-25T11:07:30-07:00"/> <publisher value="Financial Management"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="This value set includes the financial processing priority codes."/> <copyright value="This is an example set."/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/process-priority"/> <content value="complete"/> <concept> <code value="stat"/> <display value="Immediate"/> <definition value="Immediately in real time."/> </concept> <concept> <code value="normal"/> <display value="Normal"/> <definition value="With best effort."/> </concept> <concept> <code value="deferred"/> <display value="Deferred"/> <definition value="Later, when possible."/> </concept> </CodeSystem>