Cgm Dexcom denied as not medically necessary by UnitedHealthcare?

UnitedHealthcare's specific coverage criteria for cgm dexcom 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 UnitedHealthcare Denies Dexcom CGM on Medical-Necessity Grounds

UnitedHealthcare's medical-necessity review for Dexcom CGM applies the criteria in UHC's published coverage determination policy for continuous glucose monitoring. Denials on this basis typically reflect one of two problems: the clinical documentation submitted did not explicitly address the criteria in UHC's policy, or the clinical record does not yet contain the specific findings UHC requires. Neither situation means CGM is wrong for you clinically — it means the documentation submitted at the time of the initial request did not meet UHC's administrative standard. Both are correctable on appeal.

## Why This Denial Is Appealable

Under ACA §2719, non-grandfathered individual and group health plans must provide at least two levels of internal appeal followed by access to independent external review. ERISA §503 requires employer-sponsored plans to provide a full-and-fair review of every adverse benefit determination. You generally have approximately 180 days from the denial notice to file your first internal appeal. External review must be requested within approximately four months of the final internal denial. Expedited review — a 72-hour turnaround — is available when your health could be seriously jeopardized by waiting the standard timeline, which applies to patients with documented severe hypoglycemia or hypoglycemia unawareness.

## The Appeal Process

1. Request UHC's coverage policy for CGM. UHC publishes medical policies on its website; obtain the current version that was applied to your claim. Every argument in your appeal should map to a stated criterion. 2. File a Level 1 internal appeal with a complete, criterion-mapped clinical package. 3. File a Level 2 internal appeal if Level 1 is upheld. 4. Request independent external review after internal levels are exhausted.

## Documentation to Gather

• Diagnosis confirmation: Current ICD-10 diagnosis codes, diabetes type, duration, and treating provider.
• Treatment regimen: Current diabetes medications and insulin regimen, if applicable, with start dates.
• Monitoring history: Documentation of prior glucose monitoring approach — fingerstick frequency, logbooks, or meter downloads — and any limitations encountered.
• Hypoglycemic event history: Chart documentation of any severe hypoglycemia, emergency department visits, loss of hypoglycemia awareness, or nocturnal hypoglycemic events.
• HbA1c trend: Recent laboratory values showing glycemic control status over time.
• Prescriber medical-necessity letter: A structured letter from your physician that addresses each of UHC's policy criteria directly, citing specific chart findings with dates, and referencing the relevant professional society guideline organization (e.g., ADA Standards of Medical Care) to situate CGM within established clinical practice.

## Criteria-Mapping Structure

Print or download UHC's CGM coverage policy. Create a two-column table: UHC's stated criterion on the left; the specific chart entry — provider, date, finding — that satisfies it on the right. Submit this table as the first page of your appeal letter. Reviewers on appeal work from the same policy criteria the initial reviewer used; a criterion-by-criterion mapping eliminates ambiguity and is the single most effective way to overturn a UHC medical-necessity denial.