Hyperbaric Oxygen denied due to quantity / dose limits by Aetna?

Aetna's specific coverage criteria for hyperbaric oxygen 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 Limits Hyperbaric Oxygen Sessions — and Why You Can Appeal

Aetna's quantity-limit denials for hyperbaric oxygen therapy (HBOT) typically occur when the number of sessions requested exceeds what Aetna's current coverage policy pre-authorizes for a given indication. Insurers impose session caps because HBOT is administered repeatedly over a course of treatment, and policies are written to authorize a defined initial block of treatments before requiring reassessment. A quantity-limit denial does not mean HBOT is excluded — it means Aetna needs documented evidence that additional sessions are medically necessary based on your specific clinical response and ongoing wound or condition status.

## Your Federal Appeal Rights

If this is a fully-insured plan regulated under the ACA, you have the right to an external review under ACA §2719 after exhausting internal appeals. External review must generally be requested within four months of the final internal denial. If your plan is self-funded and governed by ERISA, §503 guarantees a full-and-fair review with a right to file in federal court after exhausting the plan's appeal process. For life-threatening or urgent conditions, request an expedited review, which compresses the timeline significantly.

## Concrete Appeal Process

1. Request the denial letter in writing. It must state the specific coverage policy provision and clinical criteria cited. 2. Obtain Aetna's published HBOT medical policy — available on Aetna's website — and read the exact session-limit language and re-authorization criteria. 3. File a Level 1 internal appeal within the timeframe on your denial notice (typically 180 days for ACA plans). 4. If denied again, file a Level 2 internal appeal if your plan offers one, then request external review.

## Documentation to Gather

• Diagnosis confirmation: operative or pathology reports, wound-care notes, or imaging confirming the underlying condition (e.g., chronic non-healing wound, compromised skin graft, osteoradionecrosis).
• Treatment history with dates and outcomes: records of each completed HBOT session, wound measurements at each reassessment, photographs if available, and objective response metrics from your wound-care team.
• Clinical severity: your treating physician's chart notes documenting the wound's current status, reasons prior sessions have been beneficial, and why the additional sessions requested are expected to produce continued meaningful improvement.
• Prescriber medical-necessity letter: a letter from your hyperbaric specialist or wound-care physician explaining — in detail — why the additional sessions are necessary, referencing the applicable wound-care or undersea-medicine guideline organization's recommendations without inventing specific numbers.

## Criteria-Mapping Structure

Aetna's policy lists specific clinical criteria for HBOT re-authorization. Use a table or numbered list in your appeal that mirrors each criterion exactly as written in Aetna's published policy, followed by the corresponding chart fact:

| Aetna Policy Requirement (copy verbatim) | Supporting Chart Evidence | |---|---| | [Paste criterion from Aetna's policy] | [Date, note, measurement from medical record] |

This structure forces the reviewer to address each criterion individually rather than issuing a blanket denial.