Interoperability

POLICY BRIEF — Thursday, May 28

**Thursday, May 28** — Thursday, May 28, 2026

Executive Briefing

Slow morning for core digital health policy. The only new Federal Register item in the 3-day scan with meaningful portfolio relevance is FDA’s extension of the AI-enabled early-phase clinical trials RFI comment period to June 29. Worth tracking for AI governance principles, physician oversight of AI-supported trial operations, and clinical research burden.
CMS’s claims attachments final rule hit its effective date this week, May 26, with compliance due May 26, 2028. This is not a new rule, but the effective date is a fresh implementation marker for administrative simplification work: claims attachments are moving to X12 275/277 and electronic signature standards, while prior authorization attachments were not finalized.
The xAI/X scan completed with findings, but it did not . The main useful signal was implementation chatter around CMS’s FHIR prior authorization path and the X12 278 enforcement-discretion issue; the underlying CMS guidance is official but dates to April 10.

FDA AI clinical trials RFI extension: FDA published an extension for the “AI-Enabled Optimization of Early-Phase Clinical Trials Pilot Program” RFI. Comments are now due June 29, 2026. Physician angle: the RFI implicates AI transparency, validation, trial-site workflow, safety monitoring, and the role of clinicians in AI-assisted early-phase research decisions. Source: https://www.federalregister.gov/documents/2026/05/28/2026-10602/ai-enabled-optimization-of-early-phase-clinical-trials-pilot-program-request-for-information
Claims attachments implementation clock: CMS’s administrative simplification claims attachments rule became effective May 26, 2026; compliance is due May 26, 2028. CMS says the rule adopts X12N 275 and 277 standards for claims attachments and electronic signatures, but does not finalize prior authorization attachment standards. Relevance: monitor whether the claims-only scope creates operational fragmentation for practices handling both claims and PA documentation. Source: https://www.cms.gov/newsroom/fact-sheets/administrative-simplification-adoption-standards-health-care-claims-attachments-transactions

No fresh congressional hearing, markup, or oversight signal surfaced in the morning scan. Senate HELP’s next listed hearing is June 3.

No new OCR/HIPAA Security Rule final rule signal found this morning. Continue monitoring, but no fresh action item from today’s scans.
ONC social activity pointed users to existing feedback and inquiry channels for certification/API and information blocking issues. Useful as a reminder that physician/practice evidence of EHR API friction, information blocking, or certification gaps should be routed into official channels, but this does not appear to be a new policy change.

The practical PA signal remains CMS’s FHIR prior authorization implementation path. CMS states that HIPAA Administrative Simplification enforcement action will not be taken against covered entities that choose an all-FHIR Prior Authorization API rather than using X12 278 as part of the electronic PA process. This is official CMS guidance, last modified April 10, and not a fresh rule today, but X/social signals suggest implementers are actively debating FHIR-only vs. X12/FHIR workflows. Source: https://www.cms.gov/priorities/burden-reduction/overview/interoperability/frequently-asked-questions/hipaa-transaction-enforcement-discretion

Claims attachments: X12 275/277 are now on the implementation runway under CMS-0053-F. No new HL7/Da Vinci/X12/NCPDP ballot or IG publication surfaced.

X/social scan status: completed with findings. Included signals were mainly implementation commentary, not new primary-source policy. Takeaway: watch for provider-facing confusion as payers, clearinghouses, EHRs, and practice-management vendors reconcile FHIR PA APIs, X12 278 enforcement discretion, and claims-attachment X12 implementation.