Anthem Denied MRI? Here's How to Appeal

Anthem, the Elevance Health company operating Blue Cross Blue Shield plans in 14 states, requires Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization for most MRI and CT scans — and those authorization requests are frequently denied. If Anthem denied your MRI, you've likely encountered one of the most opaque corners of insurance utilization management. Understanding Anthem's radiology prior authorization program and how to challenge denials is the first step to getting the imaging your doctor ordered.

Why Anthem Denies MRI Claims

Anthem uses a radiology benefits management program to evaluate MRI and CT prior authorization requests. In many markets, Anthem partners with a radiology management vendor — historically NovArcam (now part of Carelon, Anthem's health services subsidiary) — to apply clinical decision criteria to imaging requests. When your doctor submits a prior auth for an MRI, it is evaluated against these criteria, and requests that don't meet the specific clinical thresholds are denied.

The most common denial reasons for MRI include:

Insufficient conservative care: For spine MRIs (the most commonly denied category), Anthem's criteria typically require that you have undergone a defined period of conservative treatment — usually 4–6 weeks of physical therapy, rest, and analgesic medication — before an MRI will be authorized for non-acute low back pain. If your doctor ordered the MRI without documenting this trial of conservative treatment, Anthem will deny it.

Non-specific clinical indication: Anthem's radiology criteria require specific clinical findings to justify each type of MRI. For example, a brain MRI for headache requires documentation of red flag symptoms (new onset after age 50, thunderclap headache, progressive headache, neurological symptoms) or failure of adequate treatment. A knee MRI for pain requires documentation of the specific mechanism of injury, physical examination findings, and functional limitations. If the clinical documentation is vague, Anthem denies.

Duplicate or redundant imaging: Anthem may deny an MRI if you recently had a similar study, arguing that a repeat scan isn't medically necessary without documented change in clinical status.

Out-of-network facility: Even if an MRI is clinically authorized, Anthem may deny payment if the scan was performed at an out-of-network facility without prior approval, unless you can demonstrate network inadequacy or an emergency.

Anthem's Appeal Process Step-by-Step

1. Request the denial letter with specific clinical criteria. Anthem must provide the reason for denial and the specific clinical guideline or policy cited. Request the complete radiology clinical criteria document from Anthem or Carelon.

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What to Include in Your Anthem Appeal

• Ordering physician's letter documenting the specific clinical indication for the MRI, including relevant history, physical examination findings, and functional limitations
• For spine MRIs: documentation of conservative treatment already completed (PT records, medication trials, duration) or clinical reason why conservative treatment is not appropriate (e.g., progressive neurological deficits, suspicion of malignancy)
• For brain MRIs: documentation of specific red flag symptoms or failed conservative treatment for headache
• For musculoskeletal MRIs: documentation of mechanism of injury, specific physical findings (joint line tenderness, positive McMurray's, etc.), and functional impairment
• American College of Radiology (ACR) Appropriateness Criteria supporting the requested imaging for your specific clinical scenario
• Documentation of urgency if delay in diagnosis could cause harm
• Prior imaging reports if this is a follow-up study, and documentation of the clinical change that justifies repeat imaging

State-Specific Notes

Anthem's radiology prior authorization program operates in all 14 states where Anthem has plans, but the appeal mechanisms vary. In California, Anthem Blue Cross members can use the DMHC's Independent Medical Review process for imaging denials, which tends to be faster and more consumer-favorable than the federal IRO process. The DMHC has specifically cited imaging prior authorization as an area of concern for California insurers. In Indiana and Ohio, where Anthem has significant employer group plan market share, most plans are ERISA self-funded — federal appeal rights apply. In New York, Empire BlueCross is subject to state utilization review laws with strict timelines. In Connecticut and Virginia, state prior auth reform legislation affects how Anthem must process and respond to imaging authorization requests.

Fight Back With ClaimBack

An MRI denial is particularly frustrating because the imaging your doctor ordered is the tool needed to understand what's wrong — denying it doesn't make you less sick, it just delays diagnosis. These denials are frequently based on documentation gaps rather than genuine clinical disagreement, which means they're very appealable when you submit the right information.

ClaimBack helps you work with your doctor to put together the clinical documentation Anthem's radiology reviewers are looking for, and to write an appeal letter that addresses the specific denial reason point by point. A scan your doctor says you need is worth fighting for.

Start My Free Appeal →

Related Reading

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal