FHIR (Fast Healthcare Interoperability Resources)
FHIR is the modern data standard for exchanging healthcare information between systems. FHIR APIs are how a health tech platform talks to EHRs, labs, and other care systems without a custom point-to-point integration for every partner.
Key takeaways
- Modern API-based standard using resources and REST
- Replaces custom point-to-point links with a shared vocabulary
- Implementations still vary, so some per-vendor work remains
- Profiles like US Core constrain and clarify the data
- The sensible default interface for new health tech builds
What FHIR means
FHIR is the modern, web-friendly standard for moving healthcare data between systems, built around familiar API concepts like resources and RESTful requests. Instead of parsing dense legacy messages, developers work with discrete resources such as Patient, Observation, or Medication that map reasonably well to how a modern engineer thinks. That accessibility is a big part of why it has become the default way new health tech connects to EHRs, labs, and other care systems.
The value of FHIR is that it replaces custom point-to-point work with a shared vocabulary, so once you speak FHIR you can talk to many systems in broadly the same way. In reality, though, implementations differ, and vendors support different resource versions and profiles, so some per-partner adjustment is normal. Profiles and implementation guides such as US Core exist precisely to reduce that variation and set expectations for what a given field should contain.
For a founder, FHIR is usually the interface you want to build against for anything new, because it keeps integration costs down as you add data sources. It does not remove the compliance work, and it does not always cover the older feeds a hospital still runs. Treat it as the strong default while planning for the reality that some providers will still hand you legacy interfaces alongside it.