Cigna / Evernorth Claim Denied? How to Appeal Your Cigna Denial

Why Cigna (Evernorth) Denies Claims

Cigna, rebranded under its parent company Evernorth Health Services, serves approximately 14 million health plan members through employer-sponsored, ACA marketplace, global expatriate, and Medicare Advantage plans. Despite this scale, Cigna's claim denial practices have drawn regulatory scrutiny — most notably the 2023 ProPublica investigation revealing that Cigna's automated PxDX system denied tens of thousands of claims in seconds without individualized physician review.

The most common reasons Cigna denies claims include:

• Not medically necessary — Cigna's utilization review determined the treatment does not meet internal clinical criteria
• Prior Authorization Denied: How to Appeal" class="auto-link">Prior authorization not obtained — The service required pre-approval that was not secured before treatment
• Alternative treatment required — Cigna argues a less costly alternative should be tried first (step therapy)
• Insufficient documentation — Clinical records submitted do not support the medical necessity determination
• Experimental or investigational — Cigna classifies the treatment as unproven despite clinical evidence
• Out-of-network provider — The provider is outside Cigna's network
• Service not covered — The treatment is excluded under your plan

These denials frequently rely on Cigna's internal Clinical Policy Bulletins (CPBs), which may be more restrictive than widely accepted medical standards. You have the legal right to request a copy of the specific CPB used to deny your claim.

Your Appeal Rights with Cigna (Evernorth)

When Cigna denies your claim, federal and state law guarantee your right to challenge that decision.

Key appeal facts:

• Appeal deadline: 180 days from the date on the denial letter
• Regulatory authority: Your state department of insurance (for fully insured plans); U.S. Department of Labor (for self-funded ERISA plans)
• Plan types covered: Employer-sponsored, ACA marketplace, Medicare Advantage, global expatriate

Under the Affordable Care Act, you are entitled to:

1. A written explanation of the denial, including the specific policy language and clinical criteria applied
2. At least one level of internal appeal reviewed by someone who was not involved in the original denial decision
3. External Independent Review: Complete Guide" class="auto-link">External review by an independent physician if the internal appeal is denied — and the external reviewer's decision is binding on Cigna
4. Expedited review (decision within 72 hours) if delay could seriously jeopardize your health

For employer-sponsored plans, ERISA provides additional protections: access to your complete claims file (including internal reviewer notes), the right to sue Cigna in federal court, and the right to a full and fair review in which Cigna cannot simply defer to its initial denial.

Common Denial Reasons and How to Counter Them

"Not medically necessary": Request Cigna's Clinical Policy Bulletin for the denied service. Obtain a detailed physician letter citing clinical guidelines from professional societies (AHA, AAOS, APA, NCCN, etc.) that support the treatment. External reviews using independent clinical standards frequently overturn Cigna's medical necessity determinations.

"Prior authorization not obtained": If care was urgent, cite the ACA's emergency services provision — emergency care cannot be denied for lack of prior authorization. If the PA was applied for and denied, that is a separate appeal from the underlying claim.

"Experimental or investigational": Request the specific investigational classification criteria from Cigna's CPB. Cite FDA approval status, peer-reviewed literature, and specialty society guidelines that support the treatment as standard of care.

"Step therapy required": If the required drug has failed, is contraindicated, or is clinically inappropriate, cite applicable state step therapy override laws and ACA provisions. Many states require Cigna to grant overrides in these circumstances.

"Out-of-network": If no in-network provider is reasonably accessible, file a network adequacy complaint with your state insurance department. Cigna may be required to cover the out-of-network provider at in-network rates.

Documentation Checklist

Before filing your appeal, gather:

• Cigna denial letter (with specific denial code and reason)
• Member ID, group number, and claim reference number
• Complete medical records related to the denied service
• Treating physician letter of medical necessity
• Relevant lab results, imaging reports, or specialist consultation notes
• Cigna's Clinical Policy Bulletin for the denied treatment (request from Cigna)
• Clinical practice guidelines from professional societies relevant to your condition
• Records of all prior treatments attempted (for step-therapy denials)
• Proof of prior authorization requests and Cigna's response
• Cigna's complete claims file (request under ACA or ERISA)

Step-by-Step: How to Appeal Your Cigna Denial

Step 1: Identify the Denial and Deadline

Read Cigna's denial letter carefully. Locate: the specific denial reason, the policy provision cited, your appeal deadline (typically 180 days), and filing instructions. Mark the deadline on your calendar immediately.

Step 2: Request the Claims File

Contact Cigna and request your complete claims file. Under ERISA and the ACA, Cigna must provide all documents, records, and information used in the denial decision — including the CPB applied, reviewer's notes, and clinical criteria. Reviewing the file often reveals flaws in Cigna's reasoning.

Step 3: Build Your Medical Case

A well-documented appeal letter is the most important factor in overturning a denial. Your appeal should:

• Quote the exact denial reason from Cigna's letter
• Present your physician's detailed medical necessity letter addressing every point in the CPB
• Cite clinical guidelines from relevant professional societies
• Include objective medical evidence: imaging, lab results, specialist notes
• Address Cigna's specific clinical criteria point by point — not just a general statement of need

Step 4: Request Peer-to-Peer Review

Your treating physician can request a peer-to-peer review — a direct conversation with Cigna's medical director. This is often the fastest path to overturning a clinical denial, particularly for medical necessity and prior authorization disputes.

Step 5: Cite the Applicable Regulations

Reference the specific laws that support your appeal:

• ACA essential health benefits — if the treatment falls under the 10 EHB categories
• Mental Health Parity (MHPAEA) — if treatment involves mental health or substance use disorders
• State insurance mandates — many states require coverage for specific treatments
• No Surprises Act — if out-of-network billing is at issue
• ERISA § 502(a) — for employer plan participants seeking benefits in federal court

Step 6: Submit and Follow Up

Send your appeal via certified mail AND through the MyCigna portal. Keep copies of everything with delivery confirmation. Note Cigna's response deadline and follow up in writing if it passes.

What to Do If Cigna Denies Your Internal Appeal

External review. An IROs) Explained" class="auto-link">Independent Review Organization (IRO) assigns a physician specialist to evaluate your case independently. The IRO's decision is binding on Cigna. Studies show external reviews overturn 40–60% of denials.

Peer-to-peer review. If you have not already, request a peer-to-peer review — your treating physician speaks directly with Cigna's medical director. This can be pursued even while an appeal is pending.

Regulatory complaint. File a complaint with your state department of insurance (for fully insured plans) or the U.S. Department of Labor EBSA (for ERISA plans). Regulators track complaint patterns, and a formal complaint creates documented pressure on Cigna.

Legal consultation. For high-value claims, an insurance appeal attorney may take your case on contingency. ERISA LTD cases and large medical claim denials often justify legal representation.

Common Mistakes to Avoid

Missing the 180-day deadline. Cigna strictly enforces the appeal window. File well before the deadline expires.

Being too vague. Generic statements are not persuasive. Address Cigna's specific denial criteria with specific evidence.

Not requesting the claims file. The file often reveals weaknesses in the denial rationale that your appeal can directly address.

Giving up after one level. The process has multiple levels for a reason. Many claims denied internally are overturned on external review.

Fight Back With ClaimBack

Cigna's denial process has real vulnerabilities — and a well-constructed appeal exploits them. Whether your denial was based on medical necessity, prior authorization, experimental classification, or step therapy, ClaimBack generates a professional appeal letter in 3 minutes that cites the specific regulations and clinical guidelines for your Cigna denial.

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Related Reading

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