Outpatient Therapy denied for missing prior authorization by Aetna?

Aetna's specific coverage criteria for outpatient therapy 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 Aetna Denied Outpatient Therapy for Prior Authorization

A prior-authorization (PA) denial means either that authorization was not obtained before the service was rendered, or that a PA request was submitted and Aetna determined the service did not meet its coverage criteria. These are treated differently: a retro-authorization denial for a service already delivered is often reversible on procedural grounds, while a prospective PA denial is a clinical-criteria dispute. Identifying which situation applies shapes your appeal strategy.

## Why This Denial Is Appealable

For retro-authorization denials: if a provider or plan representative gave oral confirmation that the service was covered, or if the plan's own administrative processes contributed to the failure to obtain authorization, courts and regulators have repeatedly found these denials unreasonable. For prospective PA denials: the clinical-necessity standard still applies, and the appeal record before an IRO is a full de novo review.

For Mental Health Parity Act purposes: if this is a behavioral health service, Aetna's prior-authorization requirements must be no more stringent than those applied to comparable medical or surgical services. You are entitled to a written parity analysis on request.

## Federal Appeal Framework

• ACA §2719 External Review: Non-grandfathered plans must offer IRO review after internal appeals are exhausted. The external-review window is typically around four months from denial.
• ERISA §503: Entitles you to all documents and criteria used in the denial decision.
• Expedited review: If the service is ongoing and urgently needed, request expedited internal and external review simultaneously.

## Appeal Timeline

1. Determine whether this is a retro-authorization or a prospective PA denial. 2. File an internal appeal with Aetna (check your EOB for the deadline). 3. For retro denials, document any prior verbal or written authorization representations. 4. If denied internally, submit to external review before the deadline.

## Documentation to Gather

• Prior authorization records: Any PA request submissions, reference numbers, or verbal confirmation records (caller name, date, time, reference number).
• Diagnosis and clinical records: Supporting the medical necessity of the service.
• Treating clinician PA letter: Mapping the clinical presentation to Aetna's published PA criteria for outpatient therapy.
• Parity documentation (if applicable): Evidence of disparity between behavioral-health PA requirements and comparable medical-benefit PA requirements.
• Timely-filing evidence: Proof of submission dates if a procedural deadline is at issue.

## Criteria-Mapping Structure

Obtain Aetna's PA criteria from the published clinical policy bulletin for outpatient therapy:

| PA Requirement | Supporting Documentation | |---|---| | Diagnosis meets covered indication | Current diagnostic records | | Medical necessity criteria satisfied | Treating clinician letter with chart evidence | | PA request submitted timely (if retro) | Submission records with timestamps | | Verbal authorization obtained (if applicable) | Call log with reference number |