Cigna Insurance Claim Denied? How to Appeal

Cigna Healthcare (now part of The Cigna Group) covers over 17 million insured lives in the United States through commercial employer plans, ACA marketplace plans, Medicare Advantage, and global expatriate coverage. Cigna denials — whether for medications, procedures, mental health care, or out-of-network services — are common but frequently overturnable. The appeal process is free, has multiple levels, and External Independent Review: Complete Guide" class="auto-link">external reviewers overturn a substantial portion of Cigna denials every year.

Why Insurers Deny Claims

Understanding Cigna's denial machinery helps you build a stronger appeal. Cigna's most common denial reasons include:

Medical necessity disputes. Cigna applies its Medical Coverage Policies (MCPs) and eviCore clinical criteria to determine whether a requested service is medically necessary. Denials result when clinical documentation does not satisfy each criterion in the relevant MCP, or when Cigna's reviewers disagree with your physician's judgment.

Prior Authorization Denied: How to Appeal" class="auto-link">Prior authorization not obtained. Cigna requires prior authorization for hundreds of services, procedures, and medications. Claims for services rendered without required prior authorization are denied administratively, even when the care was clinically appropriate.

Out-of-network provider. Services from providers outside Cigna's network are denied or reimbursed at reduced out-of-network rates. Emergency out-of-network care has federal protections under the No Surprises Act (42 U.S.C. § 300gg-131 et seq.).

Step therapy requirements. Cigna may require you to try a less expensive drug or treatment before approving the one your physician prescribed. Step therapy denials can be challenged when the required step is clinically inappropriate for your specific condition.

Formulary exclusions and administrative errors. A drug your doctor prescribed may not appear on your plan's formulary, or wrong diagnosis codes, missing modifiers, and duplicate claim submissions create technical denials correctable with a corrected claim.

How to Appeal a Cigna Denial

Step 1: Understand Your Denial Letter

When Cigna denies a claim or prior authorization, you receive an Adverse Benefit Determination (ABD) letter. Under ERISA Section 503 (29 U.S.C. § 1133) and ACA regulations, this letter must include the specific reason for the denial, the plan provision or clinical criteria relied on, your appeal rights and deadlines, and the name and specialty of the reviewing clinician for medical necessity denials. Request the complete claims file immediately — including reviewer notes and the specific MCP or eviCore criteria applied to your case.

Step 2: Obtain and Review Cigna's Medical Coverage Policy

Cigna uses its own Medical Coverage Policies (MCPs) as internal clinical criteria. Download the specific MCP referenced in your denial from cigna.com/healthcare-professionals/coverage-policies. Review each coverage criterion against your medical records and identify documentation gaps. Your physician's appeal letter should address each MCP criterion specifically.

Step 3: Build Your Medical Evidence Package

Ask your physician to write a letter of medical necessity that addresses Cigna's denial reason using the exact language from the MCP criteria — not just a general statement of medical need. Compile clinical guidelines from relevant specialty societies (NCCN, ACC/AHA, ADA) and published peer-reviewed studies supporting your treatment.

Step 4: Request a Peer-to-Peer Review

Before or during the internal appeal, your physician can request a peer-to-peer review — a direct call with Cigna's Medical Director or the eviCore reviewer who denied the claim. This conversation lets your doctor present clinical details that may not be apparent from records alone. Many denials are overturned at this stage without a formal written appeal.

Step 5: File Your Level 1 Internal Appeal

File within 180 days of receiving the denial. Submit through myCigna.com, by certified mail to the appeals address on your denial letter, or by calling 1-800-CIGNA-24 (1-800-244-6224). Cigna must respond within 30 calendar days (standard) or 72 hours (expedited, for urgent medical situations).

What to Include in Your Appeal

• Denial letter with the specific denial reason and MCP citation
• Cigna's Medical Coverage Policy for the denied treatment (download from cigna.com)
• Complete medical records supporting your diagnosis and treatment history
• Letter of medical necessity from your treating physician citing specific MCP criteria
• Clinical guidelines from relevant specialty societies (NCCN, ACC/AHA, ADA, etc.) that support your treatment

Fight Back With ClaimBack

Cigna's appeals process has multiple levels, strict deadlines, and requires clinical documentation targeted precisely at Cigna's own Medical Coverage Policies and the specific denial reason. ClaimBack generates Cigna-specific appeal letters that address Cigna's Medical Coverage Policies by name, cite the clinical guidelines that override insurer criteria, and invoke applicable federal and state protections including Mental Health Parity Act (MHPAEA) Explained" class="auto-link">MHPAEA and the No Surprises Act. ClaimBack generates a professional appeal letter in 3 minutes.

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Related Reading

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