How to Appeal a Cigna Denial — Step-by-Step Guide

Cigna (now operating as The Cigna Group, with its health insurance business under Cigna Healthcare) serves more than 18 million members in the United States. If Cigna denied your health insurance claim, you're dealing with one of the industry's largest insurers — but that doesn't mean their denial is final. You have clear legal rights to appeal, and the process is well-defined.

This guide covers the specific Cigna appeal process step by step, including their unique features like Coverage Policy documents, peer-to-peer reviews, and what to do if Cigna misses their own deadlines.

Step 1: Understand Your Cigna Denial

Cigna's denial letter (called an "Adverse Benefit Determination") must include:

• The specific reason for the denial — including clinical rationale and any Cigna Coverage Policy referenced
• The plan provision supporting the denial
• Your appeal rights — including deadlines, methods, and contact information
• Your right to request copies of Cigna's internal guidelines, protocols, and the clinical reviewer's qualifications

Pay special attention to whether Cigna cites a specific Coverage Policy document — this tells you exactly which clinical criteria they used and gives you a roadmap for building your appeal.

If you need help understanding the denial language, our guide to reading an EOB explains common terms and codes.

Step 2: Contact Cigna

• Cigna Customer Service: 1-800-244-6224 (or the number on your ID card)
• myCigna Portal: my.cigna.com — view claims, denial details, and submit appeals
• Cigna Mobile App: Available for iOS and Android for on-the-go claim management

When you call, ask:

1. "What specific Coverage Policy or clinical criteria was used to deny my claim?"
2. "Can my doctor request a peer-to-peer review with your medical director?"
3. "How many levels of internal appeal does my plan require?"
4. "What documentation would you need to reconsider this denial?"
5. "Is there a specific appeal form I should use, or can I submit a letter?"

Record everything: Date, time, representative's name, call reference number, and a summary of what was discussed.

Step 3: Research and Gather Evidence

Cigna's Coverage Policy documents

Cigna publishes its Coverage Policies online — these are the clinical criteria that Cigna's medical reviewers use to approve or deny claims. Search for the policy related to your denied service at cigna.com/knowledge-center/coverage-policies.

Read the relevant Coverage Policy carefully. If your situation meets the criteria for coverage, quote the specific language in your appeal. If Cigna's reviewer misapplied their own criteria, this is your strongest argument.

Doctor's letter of medical necessity

Ask your treating physician to write a detailed letter that:

• Describes your diagnosis, symptoms, and treatment history
• Explains why the denied service is medically necessary for your specific case
• Addresses alternatives and why they're inadequate
• References Cigna's Coverage Policy criteria, showing how your case meets them
• Cites relevant medical literature and clinical guidelines

Request a peer-to-peer review

Cigna offers peer-to-peer review where your doctor can speak directly with a Cigna medical director about the denial. This is particularly effective for medical necessity denials. Your doctor's office should call Cigna's provider line and request a peer-to-peer, referencing the claim number. Many denials get resolved during these conversations without a formal appeal.

Appeal letter

Use our free appeal letter template and customize it for Cigna. Include your member ID, claim number, group number, and date of service. Address the denial reason point by point.

Step 4: File Your Internal Appeal

By mail

Cigna
National Appeals Organization
P.O. Box 188011
Chattanooga, TN 37422

Note: Your plan may have a different appeal address. Always use the address on your denial letter.

By fax

Use the fax number listed on your denial letter. Keep the confirmation page.

Online

Log in at my.cigna.com, go to your claims section, and look for the appeal option. You can upload supporting documents through the portal.

Cigna appeal timelines

Two levels of internal appeal: Many Cigna plans require two levels of internal appeal before you can proceed to external review. After your first-level appeal is denied, you typically have 60 days to file a second-level appeal. Verify this with Cigna or check your plan documents.

Deemed exhaustion: If Cigna fails to respond within the required timeframe, your appeal is "deemed exhausted" and you can immediately request external review. This is a powerful provision — document the missed deadline carefully.

Step 5: External Review

After exhausting Cigna's internal appeals, you can request an independent external review:

1. You have 4 months from your final internal appeal denial to request external review
2. An Independent Review Organization (IRO) with relevant specialty expertise reviews your case
3. The IRO decides within 45 days (72 hours for urgent cases)
4. The decision is legally binding on Cigna

For urgent situations where a delay could endanger your health, you can request simultaneous external review at the same time as your internal appeal.

Your Rights Under the No Surprises Act

The No Surprises Act provides additional protections for Cigna members:

• Emergency care: Cigna cannot deny emergency claims based on out-of-network status or lack of prior authorization. You can only be charged in-network cost-sharing for emergency services.
• Surprise billing: If you received care at an in-network Cigna facility from an out-of-network provider you didn't select, Cigna must process the claim at in-network cost-sharing levels.
• Good faith estimates: Uninsured and self-pay patients can request Good Faith Estimates and dispute charges exceeding the estimate by $400+.
• Federal IDR process: For surprise billing disputes, use the Independent Dispute Resolution process at cms.gov/nosurprises.

File a Complaint with Your State Insurance Commissioner

Your state insurance department has regulatory authority over Cigna and can investigate your complaint. This adds significant pressure to resolve your appeal.

• Find your state department at the NAIC directory
• Most states accept online complaints
• Include your denial letter, appeal, and all supporting documentation

Key states:

• Connecticut: Insurance Department at 1-800-203-3447 (Cigna's headquarters state)
• Arizona: Department of Insurance and Financial Institutions at 1-602-364-3100
• Tennessee: Department of Commerce and Insurance at 1-615-741-2176
• Colorado: Division of Insurance at 1-800-930-3745
• Illinois: Department of Insurance at 1-866-445-5364

Self-funded employer plans: If your Cigna plan is administered through a large employer's self-funded arrangement, it falls under federal ERISA law. Contact the U.S. Department of Labor at 1-866-444-3272.

Common Cigna Denial Reasons and How to Fight Them

"Not medically necessary"

Find the relevant Cigna Coverage Policy and demonstrate that your case meets the criteria. Have your doctor address each criterion specifically. Include peer-reviewed literature. Request a peer-to-peer review — Cigna's medical directors can reverse denials on the spot during these conversations.

"Requires prior authorization"

Ask your provider to submit a retroactive authorization. If the provider's office failed to get prior auth, you generally should not be liable for their administrative error. Learn more about prior authorization and your rights.

"Experimental or investigational"

This denial reason requires strong evidence that the treatment is accepted in the medical community. Gather FDA approvals, clinical trial results, medical society guidelines, and evidence that other major insurers cover the treatment. Check Cigna's Coverage Policy — their definition of "experimental" has specific criteria you can address.

"Mental health or substance abuse not covered"

Under the Mental Health Parity and Addiction Equity Act, Cigna must cover mental health services at the same level as medical/surgical services. If your mental health claim was denied, check whether Cigna is applying stricter criteria than they would for a comparable medical service. This is a common parity violation. Your state insurance department can help investigate parity complaints.

"Out-of-network"

Check No Surprises Act protections. Verify Cigna's provider directory accuracy at the time of service. Request a network gap exception if no in-network provider was reasonably available for the service you needed.

When to Get Professional Help

• Patient Advocate Foundation: Free help at 1-800-532-5274 or patientadvocate.org
• State Consumer Assistance Programs: Free insurance appeal help — find yours at cms.gov
• Healthcare attorneys: Especially valuable for large claims, ERISA disputes, or mental health parity issues
• Medical billing advocates: Start with Taven's bill review tool to check for billing errors

Get help when:

1. The claim exceeds $5,000
2. The denial involves mental health parity issues
3. You have a self-funded ERISA plan
4. You're heading to external review
5. The denial involves ongoing or critical care

Cigna Appeal Checklist

1. Read your denial letter and note the reason, deadline, and appeal address
2. Call Cigna and request the Coverage Policy used in the denial decision
3. Ask your doctor to request a peer-to-peer review with Cigna's medical director
4. Research Cigna's Coverage Policy for your service at cigna.com
5. Get a detailed letter of medical necessity from your doctor
6. Write your appeal using our free appeal template
7. Submit by mail, fax, or myCigna portal (keep proof of delivery)
8. Track Cigna's response deadline — if they miss it, you gain immediate external review rights
9. If first-level appeal fails, file second-level appeal within 60 days (if required by your plan)
10. Request independent external review within 4 months of final internal denial
11. File a state insurance complaint for additional leverage

The Bottom Line

Cigna denies claims as a routine part of their business, but their Coverage Policy documents are publicly available — giving you a clear roadmap for building a winning appeal. Combined with your doctor's peer-to-peer review option, the formal appeal process, and your right to independent external review, you have multiple tools to overturn a Cigna denial.

The key is to act quickly, document thoroughly, and don't give up after the first "no." Most people never appeal, and roughly half of those who do succeed.

Need more help? Read our complete guide to fighting hospital bills, or use Taven's bill review tool to make sure the underlying charges are fair.