Rebyota denied as not medically necessary by Cigna?

Cigna's specific coverage criteria for rebyota are defined in its own published medical/coverage policy and the FDA-approved prescribing label. A successful appeal documents that your medical records satisfy each criterion those sources list — confirmed diagnosis, any required prior treatments (with dates and outcomes), and clinical severity. If the exact criteria weren't included with your denial, request them in writing; your appeal then maps each requirement to the matching fact in your chart.

## Why Cigna Denied Rebyota for Medical Necessity — and Why You Can Appeal

Rebyota (fecal microbiota, live-jslm) is FDA-approved to prevent recurrence of Clostridioides difficile (C. diff) infection following antibiotic treatment in adults. Medical-necessity denials from Cigna typically indicate that the submitted documentation did not satisfy one or more of the criteria in Cigna's coverage policy — most commonly: insufficient documentation of prior C. diff recurrences, inadequate evidence that prior standard antibiotic courses were completed, or the absence of a specialist's documented clinical rationale. These are documentation gaps, not clinical failures, and are directly correctable on appeal.

## Why This Denial Is Appealable

Cigna's medical-necessity criteria for Rebyota are based on the drug's FDA-approved indication and established clinical standards for recurrent C. diff. If your medical records accurately reflect your history — including the number of prior episodes and the antibiotic courses used — a well-organized appeal presenting that documentation in the format Cigna requires has a strong chance of success. The key is to request Cigna's exact coverage policy language, identify each stated criterion, and map your chart evidence to each one explicitly.

## Federal Appeal Framework

• Internal appeal: File within the deadline stated on your denial notice. Under ERISA Section 503 (employer plans) or ACA Section 2719 (marketplace/ACA plans), you are entitled to a full-and-fair review and access to the clinical criteria used.
• External review: After exhausting internal remedies, independent external review is available. The standard window is approximately 4 months from the final internal denial.
• Expedited review: If your condition is urgent — recurrent C. diff can cause serious illness — expedited review may be available.

## Appeal Timeline

1. Request the denial reason in writing and obtain Cigna's current coverage policy for Rebyota. 2. Identify every criterion listed in the policy. 3. Compile chart documentation that addresses each criterion and have your prescriber write a detailed letter. 4. File the internal appeal with all supporting materials. 5. If denied internally, file for external review immediately.

## Documentation to Gather

• C. diff diagnosis confirmation: Lab results (positive toxin or PCR tests) with dates for each episode.
• Prior antibiotic treatment history: Documentation of each prior C. diff treatment course — agent used, dates, completion, and outcome — demonstrating recurrence.
• Clinical severity: Chart notes documenting symptom burden, hospitalizations, or functional impact related to recurrent C. diff.
• Prescriber medical-necessity letter: Your gastroenterologist or infectious disease specialist should explicitly address each of Cigna's coverage criteria, citing the FDA-approved indication and the applicable professional society guideline (e.g., from the Infectious Diseases Society of America) without asserting specific numeric thresholds.

## Criteria-Mapping Structure

Obtain Cigna's coverage policy for Rebyota. Map each requirement to chart evidence:

| Cigna Coverage Criterion | Supporting Chart Evidence | |---|---| | Confirmed C. diff diagnosis | Lab results with dates | | Prior episodes meeting policy threshold | Episode dates and lab confirmations | | Prior antibiotic course(s) completed | Prescription records and treatment notes | | Prescriber attestation of medical necessity | Specialist letter citing FDA label and guidelines |

A structured, criterion-by-criterion response is the most effective format for overturning this type of denial.