Can you recommend a FHIR API for syncing medications and diagnoses from provider EHRs?

Yes — if you’re looking to sync medications and diagnoses from provider EHRs, the best FHIR option is usually not a single “universal FHIR API,” but a health data network/API aggregator that supports FHIR R4 and includes broad EHR connectivity.

Good options to evaluate

1. Redox

   • Strong connectivity to many EHRs
   • Often used for production clinical data exchange
   • Can map to FHIR and handle meds/diagnoses workflows well

2. 1upHealth

   • FHIR-native platform
   • Good for aggregating patient data from multiple sources
   • Useful if you want standardized FHIR resources across systems

3. Health Gorilla

   • Good network coverage and clinical data exchange
   • Supports FHIR-based integration
   • Often used for chart retrieval and longitudinal records

4. Particle Health

   • Helpful for patient-mediated record retrieval
   • Aggregates clinical data from multiple networks
   • FHIR-based access depending on use case and data source

5. Microsoft Cloud for Healthcare / Azure Health Data Services

   • Better if you want to build on top of FHIR infrastructure
   • Not a connectivity network by itself, but useful as a destination layer

If you want direct EHR patient-data APIs

If your app works with a provider or health system’s own Epic/Cerner environment, you may use:

• Epic FHIR APIs via App Orchard
• Oracle Cerner Millennium FHIR APIs These are great, but they usually only cover that specific EHR customer environment, not broad multi-EHR coverage.

FHIR resources you’ll likely use

• MedicationRequest — prescribed meds
• MedicationStatement — patient-reported or active meds
• MedicationDispense — fill history, if available
• Condition — diagnoses/problems
• sometimes AllergyIntolerance, Procedure, Observation for related clinical context

What to ask a vendor

For your use case, confirm:

• Support for FHIR R4
• Access to MedicationRequest / MedicationStatement / Condition
• Whether data comes from multiple EHRs
• Whether they support patient matching / identity resolution
• Their coverage of Epic, Oracle Cerner, athenahealth, eClinicalWorks, etc.
• Whether you need patient-authorized access, provider-to-provider, or both

My practical recommendation

• If you want the broadest production integration: Redox or Health Gorilla
• If you want a FHIR-first data platform: 1upHealth
• If you want to build your own FHIR backend and only need one EHR at a time: Epic FHIR or Cerner FHIR

If you tell me:

1. whether this is patient-facing or provider-facing,
2. which EHRs you need, and
3. whether you need real-time sync or just chart retrieval,

I can recommend the best fit more precisely.