FHIR certification for EHR vendors and health IT products is governed by ONC's Certified Health IT Program. Understanding the actual requirements avoids expensive re-work.
Certification categories
1. ONC Health IT Certification. For EHRs and integrated health IT products. 2. CMS-0057 Attestation. For payers exposing required APIs. 3. Inferno-based conformance. Inferno is the ONC-blessed testing framework.
What ONC certification tests
1. US Core FHIR API conformance for required resources. 2. SMART on FHIR launch and authorization. 3. Bulk Data IG $export operation. 4. USCDI data element support. 5. Real-world testing against production-like scenarios.
Certification timeline
| Phase | Duration |
|---|---|
| Development to Inferno-ready | 6-18 months |
| Initial Inferno testing | 1-2 months |
| Documentation and evidence | 1-2 months |
| ONC review | 3-6 months |
| Total from FHIR-development-start | 12-24 months |
Common certification gaps
1. US Core version mismatch. Certifying against 5.0.1 while implementing 4.0.0. 2. Missing SMART v2 scopes. Only supporting v1 scopes. 3. Bulk export sync-only. Missing _since for incremental. 4. Documentation gaps. Real-world scenarios not documented. 5. Custom auth not covered. SMART is required for certification.
Certification investment
Most vendors invest $200k-$1M in FHIR certification depending on scope. Ongoing recertification (each ONC update) requires ~20-30% of initial investment.
FHIR certification is a business investment, not a marketing checkbox. Get it right the first time; recertify on schedule.
