Cigna Billing Disputes: Denials, Medical Necessity Appeals, and EOB Errors

Using the myCigna Portal for Disputes

myCigna.com is your command center for any billing dispute. Before calling or mailing anything, log in and:

• Navigate to Claims and locate the denied or underpaid claim by date of service
• Click through to the Explanation of Benefits (EOB) PDF—download and save it
• Note the reason code on the EOB (e.g., "medical necessity not established," "prior authorization required," "non-covered service")
• Check your plan documents under "Plan Information" to confirm whether the service is covered at all
• Use the Secure Message feature to create a written record of your dispute without waiting on hold

The portal also lets you initiate an appeal directly: click "Appeal this Decision" on the denied claim page. This timestamps your request and creates a case number you can reference in all follow-up.

Finding and Fixing EOB Errors

Many Cigna billing disputes are not complex coverage denials—they are simple errors in how a claim was processed. The most common EOB errors include:

Medical Necessity Appeals

Cigna publishes its Medical Coverage Policies (MCPs) on cigna.com. These are the exact criteria Cigna's reviewers use to determine whether a service is medically necessary. When Cigna denies a claim for medical necessity, the denial letter must cite the specific policy that applies.

Your appeal strategy:

1. Download the applicable MCP from cigna.com and read the coverage criteria carefully.
2. Ask your physician to write a letter that addresses each criterion in the MCP by name—don't just say the service was needed, say it met criterion 2(b) because of specific clinical findings.
3. Request a peer-to-peer review between your physician and Cigna's medical director within 48 hours of the denial. This is often the fastest path to reversal.
4. Attach clinical evidence: lab results, imaging reports, specialist notes, and published treatment guidelines from specialty societies (e.g., American College of Cardiology guidelines for cardiac procedures).

If Cigna's first-level review upholds the denial, request escalation to a second-level review by a different clinical reviewer. Cigna's process typically includes two internal review levels before external review.

Cigna Behavioral Health Billing

Mental health and substance use disorder (SUD) coverage is often carved out to Cigna Behavioral Health (CBH), which applies its own network, prior auth requirements, and coverage criteria separate from your medical plan. This is a major source of billing confusion.

Key differences with Cigna Behavioral Health:

• Separate network: A provider in Cigna's medical network may not be in the CBH network. Always verify behavioral health providers through CBH specifically.
• Separate prior auth: Inpatient psychiatric admissions, residential treatment, intensive outpatient programs (IOPs), and partial hospitalization programs (PHPs) almost always require CBH prior auth, separate from any medical prior auth.
• Mental Health Parity Act protections: Federal law requires Cigna to apply no stricter limitations to mental health and SUD benefits than it applies to comparable medical and surgical benefits. If you believe Cigna is applying tighter criteria to behavioral health than to comparable medical services, cite the Mental Health Parity and Addiction Equity Act (MHPAEA) in your appeal.
• Appeals through CBH: File behavioral health appeals with Cigna Behavioral Health specifically—not Cigna's general Member Services.

For mental health parity complaints, you can also file with your state insurance commissioner or with the Department of Labor (ERISA plans).

Step-by-Step Appeal Process

1. Log in to myCigna.com and download your EOB for the denied claim.
2. Identify the specific denial reason and find the relevant Cigna Medical Coverage Policy at cigna.com.
3. Call Member Services (or CBH for behavioral health) to ask whether the denial can be resolved informally or whether a peer-to-peer is available before filing a formal appeal.
4. Gather documentation: physician letter, medical records, prior auth approval (if applicable), and clinical guidelines.
5. File your written appeal at myCigna.com or by certified mail within 180 days of the EOB. Reference your claim number and the specific MCP criteria.
6. Track the response: Cigna has 60 days for post-service appeals. If no response, follow up in writing.
7. If denied at Level 1, request Level 2 internal review if available, then proceed to IRO external review.

External Review (IRO)

After exhausting internal appeals, you have the right to Independent Review Organization (IRO) external review. The IRO is neutral and its decision is binding on Cigna. Request IRO review within 4 months of Cigna's final internal denial. Cigna's denial letter will provide contact information for the approved IRO process in your state.

Timelines and Key Contacts

• Internal appeal deadline: 180 days from EOB date
• Cigna response (post-service): 60 days
• Cigna response (pre-service): 30 days
• Cigna response (urgent/expedited): 72 hours
• IRO external review deadline: 4 months from final internal denial
• Cigna Member Services: Number on your ID card; general commercial line 1-800-244-6224
• Cigna Behavioral Health: Number on your ID card (separate from medical line)
• myCigna.com: Member portal for EOBs, appeals, and secure messaging
• EBSA (ERISA plans): 1-866-444-3272

• Cigna — Appeals and Disputes
• Cigna — Medical Coverage Policies
• Department of Labor — Mental Health Parity (MHPAEA)
• CMS — ACA External Review Requirements