This code system http://hl7.org/fhir/action-code defines the following codes:

Code Display Definition
send-message Send a message The action indicates that a particular message should be sent to a participant in the process.
collect-information Collect information The action indicates that information should be collected from a participant in the process.
prescribe-medication Prescribe a medication The action indicates that a particular medication should be prescribed to the patient.
recommend-immunization Recommend an immunization The action indicates that a particular immunization should be performed.
order-service Order a service The action indicates that a particular service should be provided.
propose-diagnosis Propose a diagnosis The action indicates that a particular diagnosis should be proposed.
record-detected-issue Record a detected issue The action indicates that a particular detected issue should be recorded.
record-inference Record an inference The action indicates that a particular inference should be recorded.
report-flag Report a flag The action indicates that a particular flag should be reported.
<status value="active"/> <experimental value="false"/> <date value="2020-12-28T16:55:11+11:00"/> <publisher value="HL7 (FHIR Project)"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org/fhir"/> </telecom> <telecom> <system value="email"/> <value value="fhir@lists.hl7.org"/> </telecom> </contact> <description value="Provides examples of actions to be performed."/> <jurisdiction> <coding> <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/> <code value="001"/> <display value="World"/> </coding> </jurisdiction> <caseSensitive value="true"/> <valueSet value="http://hl7.org/fhir/ValueSet/action-code"/> <content value="complete"/> <concept> <code value="send-message"/> <display value="Send a message"/> <definition value="The action indicates that a particular message should be sent to a participant in the process."/> </concept> <concept> <code value="collect-information"/> <display value="Collect information"/> <definition value="The action indicates that information should be collected from a participant in the process."/> </concept> <concept> <code value="prescribe-medication"/> <display value="Prescribe a medication"/> <definition value="The action indicates that a particular medication should be prescribed to the patient."/> </concept> <concept> <code value="recommend-immunization"/> <display value="Recommend an immunization"/> <definition value="The action indicates that a particular immunization should be performed."/> </concept> <concept> <code value="order-service"/> <display value="Order a service"/> <definition value="The action indicates that a particular service should be provided."/> </concept> <concept> <code value="propose-diagnosis"/> <display value="Propose a diagnosis"/> <definition value="The action indicates that a particular diagnosis should be proposed."/> </concept> <concept> <code value="record-detected-issue"/> <display value="Record a detected issue"/> <definition value="The action indicates that a particular detected issue should be recorded."/> </concept> <concept> <code value="record-inference"/> <display value="Record an inference"/> <definition value="The action indicates that a particular inference should be recorded."/> </concept> <concept> <code value="report-flag"/> <display value="Report a flag"/> <definition value="The action indicates that a particular flag should be reported."/> </concept> </CodeSystem>