Cigna Claim Denied: A Complete Guide to Appealing Your Denial

Cigna Healthcare is one of the largest health insurance companies in the United States, covering millions of Americans through employer-sponsored plans, ACA marketplace plans, Medicare Advantage, and international health coverage. A Cigna claim denial can feel like a dead end, but federal and state law give you the right to appeal — and many denials are overturned when members submit the right information.

This complete guide covers every stage of the Cigna appeal process.

Common Reasons Cigna Denies Claims

Cigna denies claims for both administrative and clinical reasons. Understanding the exact denial reason is critical before you appeal:

• Medical necessity denial: The service was reviewed against Cigna's clinical criteria or eviCore guidelines and found not to meet the standard required for coverage
• Prior Authorization Denied: How to Appeal" class="auto-link">Prior authorization required but not obtained: The service needed advance approval that was not requested before care was received
• Out-of-network services: Care was provided by a provider outside Cigna's network without an emergency exception or approved referral
• Timely filing: Cigna received the claim after the plan's filing deadline
• Billing or coding errors: Incorrect CPT, ICD-10, or NPI codes on the claim form
• Experimental or investigational: Cigna classified the treatment as unproven under its coverage policy
• Duplicate claim: A claim was already processed for the same date of service and procedure

Your EOB)" class="auto-link">Explanation of Benefits (EOB) will contain a reason code. Log into myCigna at my.cigna.com to view detailed EOB information and access the appeals portal.

Step 1: Read Your EOB and Get the Full Denial Letter

Before appealing, get the complete denial documentation. Log into myCigna to find your EOB, or call Cigna Member Services at 1-800-244-6224.

Request the full adverse benefit determination letter, which must include:

• The specific reason for denial
• The clinical criteria, policy, or plan provision applied
• The name and credentials of the reviewer
• Instructions for filing an appeal and the deadline

If eviCore managed the review, you can also call eviCore directly at 1-877-384-2653 to request their clinical rationale.

Step 2: Check for Billing Errors First

A significant percentage of claim denials are caused by billing errors rather than substantive coverage issues. Before preparing a clinical appeal, confirm with your provider:

• Correct diagnosis (ICD-10) and procedure (CPT) codes were used
• The correct Cigna member ID and group number appear on the claim
• The rendering provider's NPI matches what Cigna has on file
• The date of service and place of service codes are accurate

If the error is on the provider's side, ask them to refile a corrected claim — this is faster than going through the appeal process.

Step 3: Request Peer-to-Peer Review

For medical necessity or prior authorization denials, your treating physician should call Cigna (or eviCore if they managed the authorization) to request a peer-to-peer review. This is a clinical conversation between your doctor and the medical director who denied the claim.

Peer-to-peer reviews are most effective when your physician:

• Specifically addresses the criteria listed in the denial
• Brings the patient's complete clinical history
• References current evidence-based guidelines from specialty organizations

Step 4: File a Formal Internal Appeal

Cigna allows formal internal appeals at multiple levels. Timelines vary by plan type:

ACA-compliant plans:

• Urgent care appeals: 72 hours
• Pre-service (non-urgent): 30 days
• Post-service: 60 days

ERISA employer plans:

• Standard: 60 days
• Urgent/concurrent care: 72 hours

You typically have 180 days from the denial date to file your first internal appeal. Submit through:

• myCigna portal at my.cigna.com (preferred — provides tracking)
• Mail: Cigna Appeals, P.O. Box 188011, Chattanooga, TN 37422 (confirm current address on denial letter)
• Fax: Use the fax number listed on your denial letter

What to include in your appeal package:

• A clear appeal letter citing the denial date and claim/authorization number
• A physician letter of medical necessity specifically addressing Cigna's denial criteria
• Relevant medical records: office notes, labs, imaging, specialist reports
• Published clinical guidelines from specialty organizations (ACS, ACC, ACR, NCCN, etc.)
• Any prior authorization approvals, if the service was authorized but still denied

Step 5: Second-Level Internal Appeal

If Cigna denies your first-level appeal, many plans allow a second internal review conducted by a different physician reviewer with the appropriate specialty. Check your Summary Plan Description or call Cigna to confirm how many internal appeal levels your plan provides.

Step 6: External Independent Review

After exhausting internal appeals, you are entitled to an external review by an independent organization with no connection to Cigna. This is available under ACA rules for most plans.

• Request external review within 4 months of Cigna's final adverse determination
• Standard external review: decision within 45 days
• Expedited external review: decision within 72 hours
• The external reviewer's decision is binding — Cigna must comply

File through Cigna's appeals process or contact your state insurance department for external review options.

Filing a Complaint

For ACA marketplace plans, file a complaint at healthcare.gov or call 1-800-318-2596.

For employer-sponsored ERISA plans, contact the Department of Labor's EBSA at 1-866-444-3272.

For state-regulated plans, contact your state insurance department. Find your state regulator at naic.org.

Fight Back With ClaimBack

Cigna's appeal process spans multiple levels, and each stage requires targeted, documented evidence. ClaimBack helps you identify the right arguments, compile your documentation, and submit a professional appeal at every level — including escalation to external review.

Start your appeal with ClaimBack

Related Reading

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