CMS-0057-F Explained: What Practices Must Do Before 2026
A practical breakdown of the CMS Interoperability and Prior Authorization Final Rule, the new payer timelines, and how to prepare your workflow for January 2026.
The CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) is the most significant change to prior authorization in a decade. Starting in 2026, impacted payers must respond to standard PA requests within 7 calendar days and urgent requests within 72 hours — and they must give a specific reason for every denial.
Who is impacted
Medicare Advantage, Medicaid and CHIP managed care, state Medicaid and CHIP fee-for-service, and ACA Marketplace plans are all in scope. Commercial PPOs are not directly covered but many are aligning voluntarily.
Key deadlines
- January 2026: Shorter decision timelines go into effect.
- January 2026: Standardized denial reasons required.
- January 2027: Electronic Prior Authorization via FHIR API required.
- March 2026: First annual PA metrics reporting due.
How to prepare today
Audit your highest-volume PA codes, document current turnaround times, and confirm your EHR vendor's FHIR PA API roadmap. Practices that wait until Q4 2025 will be filing manually long after their peers go electronic.
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