The momentum behind SMART on FHIR is undeniable. According to the U.S. Office of the National Coordinator for Health IT (ONC), nearly 90% of non-federal acute care hospitals now use APIs to enable patient access to their health data through apps, and more than two-thirds have adopted FHIR APIs specifically. Adoption is also rising in patient-facing solutions; hospitals enabling app-based access grew from 68% in 2021 to nearly 80% in 2023-24, while FHIR-based access increased from 56% to almost 70% in the same period. On the developer side, over half of health IT vendors already combine FHIR with OAuth 2.0 to build secure healthcare apps.