Prior authorization is a payer review process that may apply before an imaging service. The applicable requirements depend on the plan, examination and circumstances; authorization is separate from the clinical order and appointment.
Confirm responsibilities early
Ask the ordering clinician, imaging center and payer who will submit the request, which documentation is needed and how status will be communicated. Do not assume the imaging center manages every part of the process.
If a request is denied, ask the payer for the reason and available review or appeal steps. A peer-to-peer discussion, when offered, follows that payer’s process and does not guarantee approval.
2026 CMS requirements and their scope
The CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) introduced process requirements generally beginning January 1, 2026. Its decision-timeframe requirements cover applicable Medicare Advantage, Medicaid and Children’s Health Insurance Program (CHIP) payers for medical items and services, excluding drugs.
According to CMS’s prior authorization guidance, covered payers must decide requests as quickly as the patient’s condition requires, generally within seven calendar days for standard requests or 72 hours for expedited requests after receipt. Program-specific rules permit certain extensions. These timeframes do not apply to Qualified Health Plan issuers on the Federally-facilitated Exchanges under this rule and should not be assumed to govern every commercial plan or workers’ compensation request.
The rule’s application programming interface (API) requirements generally have compliance dates beginning January 1, 2027, with dates varying by payer type. Prior authorization decision deadlines are separate from appointment availability and radiology report turnaround. Confirm the applicable plan’s requirements and request status with the payer and ordering clinician; the rule does not guarantee an approved scan or immediate imaging access.
Prepare a complete request
Confirm the ordered study, clinical reason, relevant notes and any requested prior imaging. Requirements differ; prior physical therapy or another conservative treatment should not be presented as a prerequisite for every injury or exam.
A payer decision deadline is not a promise of immediate scheduling or a report-delivery deadline. Ask separately about appointment availability, preparation, benefits and expected charges.
Plan for results and follow-up
Ask when the report is expected, how it will reach the ordering clinician and whom to contact if it has not arrived. Routine report timing depends on the study and review process; no fixed delivery deadline is promised here.
The treating clinician interprets the report alongside symptoms, examination findings and prior studies. Imaging does not by itself determine treatment, the cause of an injury or a legal outcome. Request a clinical follow-up plan.
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