AetnaPayer appeals · CVS Health

How to appeal an Aetna (CVS Health) denial

Aetna (part of CVS Health) is worth singling out for one reason: in Medicare Advantage, the overwhelming majority of its appealed prior-auth denials get overturned — which makes not appealing the costly choice.

An Aetna denial is appealable through the standard internal-then-external path for commercial and ACA plans, and through Medicare Advantage's separate process for MA members. The KFF data on Aetna's MA appeals is among the most favorable on record, and most appealable Aetna denials are medical-necessity and prior-authorization decisions.

How appeals work at Aetna

The path depends on the plan type, not the payer's brand. For employer (ERISA) and ACA marketplace plans, you generally get at least one internal appeal — federal rules give you 180 days from the denial to file it — and then an independent external review after the final internal denial. Medicare Advantage runs a separate, multi-level process: a plan reconsideration, then an automatic review by an independent entity, and further levels above that. Confirm the exact deadline and address on the denial notice, because they vary by plan.

The Medicare Advantage data

In 2024, KFF found that CVS Health (Aetna) overturned 89.7% of the Medicare Advantage prior-authorization denials that were appealed — yet, as across the industry, only a small share of denials were appealed at all.

What Aetna commonly denies

  • Medical necessity for procedures, imaging, and specialty drugs.
  • Prior authorization not on file or criteria not documented.
  • Pharmacy review (CVS Caremark) — step therapy, formulary, quantity limits.
  • Level-of-care and site-of-care decisions.

Is an Aetna denial worth appealing?

Often worth appealing

Often worth appealing — and the Medicare Advantage numbers make the point bluntly: Aetna reversed nearly 90% of appealed MA prior-auth denials in KFF's 2024 data. Build the medical-necessity case against Aetna's clinical policy, and route pharmacy denials through the CVS Caremark exception process with the trial and contraindication history.

How to appeal an Aetna denial

  1. 1

    Lead with the clinical policy

    Aetna cites a specific clinical policy bulletin; quote it and map the record to each criterion.

  2. 2

    Mind the deadline on the notice

    ERISA/ACA internal appeals generally allow 180 days; MA and external review have their own clocks.

  3. 3

    Handle pharmacy through CVS Caremark

    For a drug denial, file the formulary exception or step-therapy appeal with the documented trial history or contraindication.

  4. 4

    Escalate to external review

    After the final internal denial, request independent external review (commercial/ACA) or continue the MA appeal levels.

Aetna — frequently asked

Are Aetna appeals worth filing?
The Medicare Advantage data says yes: KFF found Aetna (CVS Health) overturned 89.7% of appealed MA prior-auth denials in 2024. The barrier is that most denials are never appealed.
Who handles Aetna pharmacy denials?
Aetna's pharmacy benefits run through CVS Caremark. A drug denial is appealed as a formulary exception or step-therapy appeal with the clinical history.

Related guides

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Sources

Appeal timeframes and venues are summarized from the federal ERISA/ACA and Medicare Advantage frameworks and vary by plan; payer-specific deadlines and addresses are on your denial notice. Medicare Advantage figures are from KFF's 2024 analysis. This is general information, not legal or coverage advice — confirm the deadline and process on the notice and the plan documents.

When the appeal has to be written, and cited

Upload the denied EOB and Merits returns a complete, citation-verified appeal letter — the clinical argument, the payer's own coverage criteria, and your federal appeal rights — in about a minute.

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