Dexa Scan denied as non-formulary by Medicare?

Medicare's specific coverage criteria for dexa scan 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 Medicare Denies a DEXA Scan as Non-Formulary

A "non-formulary" denial applied to a DEXA scan is a coverage-pathway mismatch. Formulary language is specific to Part D prescription drug plans; a DEXA scan is a diagnostic imaging service billed under Medicare Part B (for traditional Medicare) or the medical benefit of a Medicare Advantage plan. When this denial code appears on a DEXA claim, it almost always indicates an administrative routing error — the claim was processed against a drug formulary rather than the correct medical-benefit coverage policy — or a Medicare Advantage plan has categorized the service under a benefit tier that requires a different authorization pathway.

## Why This Denial Is Appealable

Because DEXA scans are a covered Medicare Part B benefit (with established National and Local Coverage Determinations), a non-formulary denial is legally unsound if the service was billed under the correct benefit category. The appeal should first clarify the correct coverage pathway, then demonstrate that the clinical criteria for that pathway are met.

## Federal Appeal Framework

• For traditional Medicare Part B: file a Redetermination within 120 days of the denial.
• For Medicare Advantage: the plan's internal appeal process applies first (typically 60 days for standard, 72 hours for expedited), followed by ACA §2719 external review by an Independent Review Organization if the internal appeal is denied.
• Expedited review is available when standard timing would seriously jeopardize health.

## Concrete Appeal Steps

1. Confirm whether the patient is enrolled in traditional Medicare Part B or a Medicare Advantage plan. 2. If traditional Medicare: verify the claim was submitted under the correct CPT/HCPCS code for bone density measurement and under Part B, not Part D. 3. If Medicare Advantage: request the plan's written coverage policy for diagnostic bone density studies (not the drug formulary) and confirm whether prior authorization was required. 4. Submit the appeal with a cover letter explaining the coverage-pathway error and attaching the relevant Medicare Part B coverage determination or the Advantage plan's medical-benefit policy. 5. Include the ordering provider's medical-necessity documentation to preempt a subsequent medical-necessity review.

## Documentation Checklist

• Denial notice with the specific denial code and reason
• Claim form showing the CPT/HCPCS code billed and the benefit category
• Applicable Medicare NCD or LCD (from cms.gov) confirming Part B coverage
• For Medicare Advantage: the plan's Evidence of Coverage and medical-benefit policy for imaging
• Ordering provider's clinical notes and medical-necessity letter

## Criteria-Mapping Structure

Identify the correct coverage policy — either the Medicare Part B NCD/LCD or the Medicare Advantage plan's medical-benefit policy for bone density studies. Map each coverage criterion to the corresponding chart documentation. Lead the appeal letter with the administrative argument (wrong denial pathway) before presenting the clinical argument.