<status value="active"/> <date value="2014-03-26"/> <description value="A participant (e.g. provider) who has referred the subject of an act (e.g. patient). Typically, a referred by participant will provide a report (e.g. referral)."/> <immutable value="true"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-ParticipationType"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="REFB"/> </filter> </include> </compose> </ValueSet>