Inspire HGNS denied due to quantity / dose limits by Aetna?

Aetna's specific coverage criteria for inspire hgns 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 Applied a "Quantity Limit" to Inspire HGNS — and How to Appeal

Inspire Upper Airway Stimulation (hypoglossal nerve stimulation, HGNS) is a surgically implanted neurostimulation system. A "quantity limits" denial in this context typically does not mean a per-fill limit as with a medication; instead, it usually reflects a restriction on the number of implant procedures, device components, generator replacements, or remote-titration sessions that Aetna will cover within a defined period. The most common trigger is a generator replacement or a revision procedure, where Aetna's system flags the claim as exceeding the allowed quantity for the benefit period.

## Federal Appeal Framework

ERISA §503 provides full-and-fair internal review rights for employer-sponsored plans. ACA §2719 adds independent external review. You generally have up to 180 days from the denial to file internally, and up to four months after a final internal denial to request external review. Expedited external review (72-hour decision) is available when delay would seriously jeopardize health — for instance, if a generator replacement is urgent because the existing device is at end of battery life.

## Your Concrete Appeal Steps

1. Identify exactly what quantity limit was applied — request Aetna's written explanation and the specific policy language governing device replacement or component frequency. 2. Establish medical necessity for the additional quantity — a generator replacement at end of battery life, or a revision needed due to device failure, is medically necessary by definition. Your physician's documentation is the foundation of the appeal. 3. Distinguish between elective and medically required additional procedures — if this is a mandatory component replacement (e.g., battery exhaustion), frame the appeal around the clinical necessity of continuous therapy, not a request for an extra elective procedure. 4. Submit a formal internal appeal with your physician's letter, device service records, and any manufacturer documentation showing the component's expected or actual end-of-life. 5. Request external review if the internal appeal is denied.

## Documentation to Gather

• Physician letter explaining the medical necessity of the additional component, replacement, or session
• Device programming/service records showing the basis for the replacement request
• Original implant operative report establishing the history of the device
• Sleep study or clinical follow-up notes confirming ongoing therapeutic benefit and need for continued therapy
• Manufacturer documentation on device lifespan or failure mode (if applicable)

## Criteria-Mapping Structure

Pull the exact quantity-limit language from Aetna's clinical policy bulletin at aetna.com/cpb. In your appeal letter, address each stated limitation directly: identify what quantity has already been used, what is now requested, and why the clinical situation justifies exceeding the standard limit. Your prescriber must state in their letter that the requested procedure is not duplicative or elective, but clinically required for your ongoing care.