[vishnuyar]

the latest version of openemr is supporting FHIR resources very well. The API is well documented too.https://github.com/openemr/openemr/blob/master/API_README.md

[sreeni_ananth]

There is definitely support, but it is nowhere near what is documented in FHIR website. You can look at the search capabilities for example : https://www.hl7.org/fhir/search.html.