The HHS Office of the National Coordinator for Health Information Technology (ONC) published its Health Data, Technology, and Interoperability Deregulatory Actions to Unleash Prosperity (HTI-5) final rule on Oct. 28, 2026, changing the ONC Health IT Certification Program, which sets the minimum capabilities an electronic health record (EHR) must have to be certified. ONC describes this regulation as resetting the regulatory foundation for future interoperability built on FHIR (Fast Healthcare Interoperability Resources), the standard for exchanging health data through web-based APIs. Learn what changed and what to ask your EHR vendor.