Cigna Denied Your Inpatient Hospital Stay? How to Appeal

Inpatient hospital denials from Cigna come in three forms: pre-authorization denials before admission, concurrent review denials during a stay, and retrospective denials after discharge. Each type follows different timelines and requires a distinct appeal strategy. Understanding which type of denial you have is the first step toward an effective challenge.

How Cigna Reviews Inpatient Admissions

Cigna applies clinical criteria — primarily MCG Health (formerly Milliman Care Guidelines) and InterQual — to evaluate whether inpatient-level care is medically necessary. These criteria define clinical benchmarks such as vital sign abnormalities, laboratory values, and functional status that must be present to justify hospital admission. When the documented clinical picture does not meet these thresholds, Cigna issues a denial.

Key review types include:

Pre-authorization review. For planned admissions (elective surgeries, scheduled procedures), Cigna reviews the request before the admission occurs. A pre-authorization denial can sometimes be resolved quickly through a peer-to-peer call between your physician and the Cigna reviewer.

Concurrent review. During your hospital stay, Cigna's utilization management team reviews ongoing medical records to determine whether inpatient care continues to be necessary. A concurrent review denial — sometimes called a continued-stay denial — is particularly disruptive because it can result in pressure to discharge you before your physicians believe you are clinically ready.

Retrospective denial. After you have been discharged, Cigna reviews the claim and determines the admission was not medically necessary. You receive an EOB showing the denial, and the financial responsibility is shifted to you.

Common Reasons Cigna Denies Inpatient Claims

Observation vs. inpatient status. Cigna may retroactively reclassify an inpatient admission as observation status, a lower level of care with different cost-sharing implications. This is one of the most financially damaging types of denial.

Acute criteria not met. The MCG or InterQual criteria require specific clinical indicators — abnormal vitals, concerning lab values, need for IV medications — that your documented record may not clearly show, even if you were genuinely sick.

Discharge was possible but not attempted. Cigna may argue that a less intensive level of care (such as a skilled nursing facility or observation status) was available and appropriate, and inpatient admission was therefore not necessary.

Social or logistical admissions. If the clinical documentation suggests the primary reason for admission was social (lack of home support, transportation issues) rather than clinical, Cigna will deny medical necessity.

What to Do During a Concurrent Review Denial

A concurrent review denial during your stay requires immediate action. Cigna must provide an expedited review decision within one business day of an urgent concurrent review request.

1. Do not leave the hospital based on Cigna's denial alone. The treating physician — not the insurer — determines when discharge is medically appropriate. If your physician believes you need to remain hospitalized, document that clinical judgment clearly in your records.

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2. Request an immediate peer-to-peer review. Your hospital's care management or utilization review team should request a peer-to-peer between your attending physician and the Cigna reviewer. This call must happen before the formal concurrent review denial is finalized.

3. File an expedited internal appeal. If the peer-to-peer does not resolve the denial, request an expedited internal appeal. For ongoing inpatient care, Cigna must respond within 72 hours.

4. Request expedited external IRO review. If Cigna upholds the denial and you believe discharge would cause imminent harm, you may be entitled to an urgent External Independent Review: Complete Guide" class="auto-link">external review with a response within 72 hours.

Appealing a Retroactive Inpatient Denial

For retrospective denials, the timeline is less urgent but the documentation requirements are significant.

Step 1: Request the complete clinical criteria used in the denial. Cigna must identify the specific MCG or InterQual criteria that your admission failed to meet.

Step 2: Obtain all clinical records from the admission. Review them carefully for documentation that does support the criteria — vital signs, lab results, clinical notes showing severity of illness.

Step 3: Have your physician write a letter of medical necessity. The letter should explain why the clinical presentation required inpatient-level care and why a lower level of care was not appropriate or safe.

Step 4: File a Level 1 internal appeal within 180 days. Submit to: Cigna Appeals, PO Box 188011, Chattanooga, TN 37422. Include all clinical records and the physician letter.

Step 5: Cite Cigna's coverage policies. Cigna's coverage policy on inpatient services is publicly available and should be referenced in your appeal to demonstrate that the clinical documentation meets or exceeds the policy criteria.

erisa-and-state-plan-considerations">ERISA and State Plan Considerations

For ERISA plan members, inpatient denials can be challenged through the DOL's Employee Benefits Security Administration if Cigna failed to comply with claims processing requirements. For state-regulated plans, state insurance department complaints are available if Cigna's review process was procedurally flawed.

Fight Back With ClaimBack

Inpatient denials affect not just your finances but your ability to receive necessary medical care. Whether the denial was concurrent or retroactive, ClaimBack helps you understand the criteria, gather clinical evidence, and build a compelling appeal.

Start your Cigna inpatient appeal at ClaimBack

Related Reading

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