https://en.wikipedia.org/wiki/Fast_Healthcare_Interoperability_Resources https://en.wikipedia.org/wiki/Fast_Healthcare_Interoperabili... They seem to be using

https://en.wikipedia.org/wiki/Fast_Healthcare_Interoperability_Resources https://en.wikipedia.org/wiki/Fast_Healthcare_Interoperabili... They seem to be using that. So only providers whose data is accessible via FHIR.