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

CodeDisplayDefinition
provider Other ProviderThe data for the immunization event originated with another provider.
record Written RecordThe data for the immunization event originated with a written record for the patient.
recall Parent/Guardian/Patient RecallThe data for the immunization event originated from the recollection of the patient or parent/guardian of the patient.
school School RecordThe data for the immunization event originated with a school record for the patient.
jurisdiction Jurisdictional IISThe data for the immunization event originated with an immunization information system (IIS) or registry operating within the jurisdiction.
<status value="draft"/> <experimental value="false"/> <date value="2023-07-17T22:16:15-06:00"/> <publisher value="FHIR Project team"/> <contact> <telecom> <system value="url"/> <value value="http://www.hl7.org/Special/committees/pher/index.cfm"/> </telecom> </contact> <description value="The value set to instantiate this attribute should be drawn from a terminologically robust code system that consists of or contains concepts to support describing the source of the data when the report of the immunization event is not based on information from the person, entity or organization who administered the vaccine. This value set is provided as a suggestive example."/> <caseSensitive value="true"/> <content value="complete"/> <concept> <code value="provider"/> <display value="Other Provider"/> <definition value="The data for the immunization event originated with another provider."/> </concept> <concept> <code value="record"/> <display value="Written Record"/> <definition value="The data for the immunization event originated with a written record for the patient."/> </concept> <concept> <code value="recall"/> <display value="Parent/Guardian/Patient Recall"/> <definition value="The data for the immunization event originated from the recollection of the patient or parent/guardian of the patient."/> </concept> <concept> <code value="school"/> <display value="School Record"/> <definition value="The data for the immunization event originated with a school record for the patient."/> </concept> <concept> <code value="jurisdiction"/> <display value="Jurisdictional IIS"/> <definition value="The data for the immunization event originated with an immunization information system (IIS) or registry operating within the jurisdiction."/> </concept> </CodeSystem>