http://terminology.hl7.org/CodeSystem/immunization-origin| Code | Display | Definition |
| provider | Other Provider | The data for the immunization event originated with another provider. |
| record | Written Record | The data for the immunization event originated with a written record for the patient. |
| recall | Parent/Guardian/Patient Recall | The data for the immunization event originated from the recollection of the patient or parent/guardian of the patient. |
| school | School Record | The data for the immunization event originated with a school record for the patient. |