Cigna Medical Necessity Denied: How to Appeal and Win

Cigna is one of the largest health insurers in the United States, covering tens of millions of Americans through employer plans, marketplace plans, and Medicare Advantage. A medical necessity denial from Cigna is frustrating, but it is also one of the most frequently overturned types of denials — if you appeal correctly.

This guide explains why Cigna denies claims as not medically necessary, which criteria systems it uses, and the exact steps to challenge the decision.

Why Cigna Denies Claims as Not Medically Necessary

A medical necessity denial means Cigna's reviewers determined that the service, procedure, or treatment was not required to diagnose or treat your condition under its clinical criteria. Common triggers include:

• Procedures or imaging ordered without documented conservative treatment failure
• Behavioral health or substance use treatment at a level of care Cigna considers too intensive
• Specialty medications or biologics without step therapy completion
• Surgeries for conditions Cigna classifies as manageable with non-surgical care
• Services outside Cigna's internal coverage policies or criteria

Cigna publishes its coverage policies publicly at cigna.com under the "Coverage Policies" section. Many denials, however, are not based on Cigna's own internal criteria but on criteria from eviCore healthcare, a third-party utilization management vendor Cigna contracts for imaging, musculoskeletal procedures, oncology, and other specialty care.

The eviCore Factor

eviCore healthcare manages Prior Authorization Denied: How to Appeal" class="auto-link">prior authorization and utilization review for a significant share of Cigna's commercial plan members. If your denial involves radiology (MRI, CT, PET scans), spine or joint procedures, cancer treatment, or cardiology, eviCore likely issued the determination.

eviCore uses its own proprietary clinical guidelines, which are separate from Cigna's internal coverage policies. This matters because:

• eviCore denials can be appealed directly through eviCore before going to Cigna
• eviCore maintains a peer-to-peer process where your physician can speak to an eviCore medical director
• eviCore's criteria are often more restrictive than what standard medical evidence supports

You can determine whether eviCore managed your authorization by checking your EOB)" class="auto-link">Explanation of Benefits (EOB) or calling Cigna member services at 1-800-244-6224. If eviCore is involved, request the specific eviCore clinical guideline number cited in your denial.

Step 1: Get the Full Denial in Writing

Under federal law, Cigna must provide a written denial that includes:

• The specific clinical reason for denial
• The clinical criteria or guideline used
• The name of the reviewing clinician
• Instructions for filing an appeal

If Cigna's denial letter is vague — for example, citing only "does not meet medical necessity criteria" without specifying the guideline — call member services and request the complete adverse benefit determination letter with the specific criteria applied.

Step 2: Request a Peer-to-Peer Review

Before filing a formal appeal, your treating physician should call Cigna (or eviCore) to request a peer-to-peer review. This is a phone call between your doctor and the medical director who denied the claim. It is not a formal appeal and does not use up your appeal rights.

Peer-to-peer reviews succeed when your physician:

• Has clinical documentation that directly addresses the denial criteria
• Can explain why the specific guideline applied does not fit your clinical situation
• References current peer-reviewed literature or specialty society guidelines (such as ACR criteria for imaging or NCCN guidelines for oncology)

Peer-to-peer reviews overturn a meaningful percentage of medical necessity denials without any further action needed.

Step 3: File a First-Level Internal Appeal

If peer-to-peer does not resolve the denial, submit a formal internal appeal. ACA-regulated plans must decide standard appeals within 30 days for ongoing care and 60 days for services not yet received. Cigna's internal appeals deadline for members is typically 180 days from the denial date.

Include with your appeal:

• A detailed letter from your physician explaining the medical necessity using language from Cigna's own coverage policy or the eviCore guideline cited
• Relevant medical records (office notes, lab results, imaging, specialist letters)
• Published clinical guidelines from national specialty organizations
• Any peer-reviewed journal articles supporting the treatment

Submit your appeal in writing via the myCigna portal (my.cigna.com) or by mail. Keep copies of everything and record the date of submission.

Step 4: Request a Second-Level Internal Appeal

If Cigna upholds the denial at the first level, most Cigna plans allow a second internal appeal reviewed by a different clinical team. Check your Summary Plan Description (SPD) or call member services to confirm your plan's appeal levels.

Step 5: External Independent Review

After exhausting internal appeals, you have the right to an independent external review. For ACA-compliant individual and small group plans, this is handled through your state's IROs) Explained" class="auto-link">independent review organization or a CMS-designated organization. The external reviewer is not affiliated with Cigna and makes a binding decision.

To request external review:

• Submit your request to Cigna or directly to your state insurance department within 4 months of the final internal denial
• The reviewer has 45 days for standard reviews and 72 hours for expedited (urgent) reviews
• For self-funded ERISA employer plans, external review is also available but is arranged through Cigna's process

Step 6: File a Complaint with Your State Insurance Department or CMS

If you believe Cigna violated your rights — for example, by failing to provide criteria, missing appeal deadlines, or applying inappropriate standards — file a complaint with your state's department of insurance. You can also contact the CMS at 1-800-MEDICARE or your state marketplace if you purchased your plan on a healthcare exchange.

For employer-sponsored ERISA plans, the Department of Labor's Employee Benefits Security Administration (EBSA) handles complaints at dol.gov/agencies/ebsa.

Fight Back With ClaimBack

A Cigna medical necessity denial is not the final word. ClaimBack helps you build a documented, evidence-based appeal that directly challenges Cigna's criteria and positions you for success at every stage — from peer-to-peer review through external independent review.

Start your appeal with ClaimBack

Related Reading

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