ModMed implements the R4 Version of the HL7® FHIR® standard. It is recommended that you become familiar with the standard by checking out the wealth of information provided by the HL7 organization. Here is a good starting point.
The MMI Certied FHIR API supports both the EMA/MMPM Platform as well as the gGastro Platform. The MMI Certied FHIR API is intended to be used for the purpose of the exchange of health information included in the U.S. Core Data for Interoperability.