PDEX covers the exchange of a Member’s Health History in the following scenarios: Provider requested Provider-Health Plan Exchange using CDS-Hooks and SMART-on-FHIR Member-authorized Health Plan to Health Plan exchange Member-authorized Health Plan to Third-Party Application exchange i.e.  Payer -> Provider, Payer -> Payer,  Payer -> Patient CDEX covers the the exchange of clinical data between a Payer system and a Provider system and between Providers i.e. Provider -> Payer,  Provider -> Provider