One of the message events defined as part of FHIR.
This value set has an inline code system http://hl7.org/fhir/message-events, which defines the following codes:
| Code | Display | Definition |
| MedicationAdministration-Complete | MedicationAdministration-Complete | Change the status of a Medication Administration to show that it is complete. |
| MedicationAdministration-Nullification | MedicationAdministration-Nullification | Someone wishes to record that the record of administration of a medication is in error and should be ignored. |
| MedicationAdministration-Recording | MedicationAdministration-Recording | Indicates that a medication has been recorded against the patient's record. |
| MedicationAdministration-Update | MedicationAdministration-Update | Update a Medication Administration record. |
| admin-notify | admin-notify | Notification of a change to an administrative resource (either create or update). Note that there is no delete, though some administrative resources have status or period elements for this use. |
| diagnosticreport-provide | diagnosticreport-provide | Provide a diagnostic report, or update a previously provided diagnostic report. |
| observation-provide | observation-provide | Provide a simple observation or update a previously provided simple observation. |
| patient-link | patient-link | Notification that two patient records actually identify the same patient. |
| patient-unlink | patient-unlink | Notification that previous advice that two patient records concern the same patient is now considered incorrect. |
| valueset-expand | valueset-expand | The definition of a value set is used to create a simple collection of codes suitable for use for data entry or validation. An expanded value set will be returned, or an error message. |