Resource Versioning

FHIR resource version history is automatically captured for each resource. The version number is automatically incremented each and every time a resource is created or changed by a subsequent POST request.
To retrieve a particular historical version of a FHIR Resource you can make a GET request like Patient/{{fhirId}}/_history/9000000000001 where 9000000000001 is the version number.
If you make a request to Patient/{{fhirId}}/_history without specifying the specific version, the response will be a bundle array of all available versions of that particular FHIR resource