This code system http://terminology.hl7.org/CodeSystem/adjudication-reason defines the following codes:

CodeDisplayDefinition
ar001 Not coveredNot covered
ar002 Plan Limit ReachedPlan Limit Reached
 <status value="draft"/> <experimental value="false"/> <date value="2022-02-23T19:42:18-07:00"/> <publisher value="Financial Management"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> </contact> <description value="This value set includes smattering of Adjudication Reason codes."/> <copyright value="This is an example set."/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/adjudication-reason"/> <content value="complete"/> <concept> <code value="ar001"/> <display value="Not covered"/> <definition value="Not covered"/> </concept> <concept> <code value="ar002"/> <display value="Plan Limit Reached"/> <definition value="Plan Limit Reached"/> </concept> </CodeSystem>