Cigna · Xifaxan He · US health-plan appeal rights

Xifaxan He denied as non-formulary by Cigna?

Q: How long do I have to appeal a Cigna Xifaxan He denial?

Internal appeal window: Typically 180 days from the denial date. External review window: Typically 60–120 days after the final internal denial. The clock starts from the date on the denial letter.

Non-formulary doesn't mean uncoverable. Most plans have a formulary-exception process: the appeal needs to show the formulary alternatives are inappropriate for your specific clinical situation.

By Michael John Ryan, Founder & Privacy Officer, DenialHelp, LLC

Last reviewed 2026-05-10

Policy data current as of 2026-04-26

US health-plan appeal rights

Cite: Most US health plans have appeal rights under either the ACA, ERISA, or Medicare/Medicaid rules

Most US health plans are required by federal law to give you both an internal appeal (where the insurer reconsiders) and an external review (where an independent reviewer decides). The exact timelines and processes depend on what kind of plan you have — marketplace / employer group, self-funded, Medicare Advantage, or Medicaid MCO — but in every case there's a window after the denial during which you have the right to fight it.

Internal appeal window

Typically 180 days from the denial date

External review window

Typically 60–120 days after the final internal denial

What Cigna typically requires

Cigna's specific coverage criteria for xifaxan he 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.

Source policy: Cigna / Express Scripts Rifaximin (Xifaxan) PA Criteria — HE

The Cigna angle on Xifaxan He

## Why Cigna Denied This as Non-Formulary

A non-formulary denial means rifaximin (Xifaxan) is not on Cigna's preferred drug list for your specific plan tier, or it is on the formulary but at a cost-sharing level that triggered a non-formulary review. Cigna's formulary management often places branded medications like rifaximin at a higher tier or excludes them entirely in favor of lower-cost alternatives — in the HE context, this commonly means lactulose is the preferred agent.

This does not mean you cannot get coverage. Non-formulary denials are routinely overcome through a formulary exception, which is a formal request for Cigna to cover the drug at a different tier or at all, based on medical necessity.

## Why This Is Appealable

Formulary exception rights: Under ACA rules, plans must have a process to grant exceptions when a formulary alternative is not clinically appropriate for a specific patient. Your prescriber's attestation that formulary alternatives are inadequate for your clinical situation is the key.
ACA §2719 external review: Non-formulary denials that are upheld internally can go to independent external review. The external reviewer considers whether the plan's formulary restriction is reasonable as applied to your specific case. You generally have approximately four months from the denial to file; confirm on your EOB.
ERISA §503: Employer plans must explain the formulary criteria and allow you to rebut them with clinical evidence.
Expedited review: Available when standard timelines would seriously harm your health.

## Documentation to Gather

Formulary exception letter from prescriber: Your physician should document (a) your HE diagnosis and severity, (b) which formulary alternatives have been tried, with dates and documented outcomes, or why they are clinically contraindicated or inappropriate for your presentation — note this is a clinical judgment your physician makes, not a factual assertion you provide, and (c) why rifaximin is medically necessary despite its non-formulary status.
Diagnosis and treatment history: Chart notes supporting the clinical picture your prescriber describes.
Cigna's formulary and coverage policy: Download these from Cigna's website. Identify the preferred alternatives listed. For each one, your documentation should address why it is not an adequate substitute in your case.

## Criteria-Mapping Approach

Cigna's formulary exception process requires demonstrating that every preferred alternative is either contraindicated, has been tried and failed, or is otherwise clinically inappropriate. List each alternative Cigna identifies in their formulary or coverage policy. For each, pair it with the specific chart fact, prescriber statement, or documented outcome that shows it is not adequate for you. This structure transforms a general appeal into a precise clinical argument that reviewers can act on without further investigation.

Next steps

Find the date on the denial letter — your appeal window starts there.
Read your plan's Summary of Benefits and Coverage (SBC) for the specific deadlines.
Request the insurer's claim file in writing — they must provide it.
Submit your appeal in writing with new clinical evidence and a physician statement.

Get the letter drafted

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Related appeal guides

Other Cigna appeals

Other denial reasons for Cigna Xifaxan He

denied as not medically necessary denied for failing step therapy denied for missing prior authorization denied as experimental or investigational denied as not FDA-approved for this use

This guide describes general US federal appeal rights based on Most US health plans have appeal rights under either the ACA, ERISA, or Medicare/Medicaid rules. Your specific plan documents (Summary of Benefits and Coverage, Evidence of Coverage) override anything here. DenialHelp is not your lawyer and not your physician — we draft appeal letters that your physician signs. Outcomes depend on your insurer's decision and factors outside our control. Reviewed by Michael John Ryan on 2026-05-10. Editorial standards: denialhelp.com/authors.