TMS denied as not medically necessary by Aetna?

Aetna's specific coverage criteria for tms 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 Denies TMS for Medical Necessity — and How to Appeal

A medical-necessity denial means Aetna's reviewer determined that transcranial magnetic stimulation (TMS) does not meet the plan's definition of medically necessary care for your specific situation — typically because the submission lacked sufficient evidence that you meet all of the clinical criteria outlined in Aetna's Clinical Policy Bulletin for TMS. This is rarely a final answer. Medical-necessity denials are overturned frequently when the appeal package resubmits the clinical record in a structured format that directly maps your documented history to each of Aetna's stated criteria.

## Why This Denial Is Appealable

Aetna's medical-necessity standard for TMS typically requires evidence of a confirmed diagnosis, documented inadequate response to prior treatments, current symptom severity, and a prescribing clinician's judgment that TMS is appropriate. When the original prior-authorization submission was incomplete, or when chart documentation exists that was not included, a well-organized appeal that supplies the missing evidence has a strong chance of success. Independent external reviewers apply objective clinical standards and frequently disagree with insurer medical-necessity determinations.

## Federal Appeal Framework

• Internal appeal (Level 1): File within 180 days of the denial. Aetna must decide within 30 days for pre-service requests and 60 days for post-service claims.
• Level 2 internal appeal: Aetna offers a second internal level; use it to add any evidence not submitted at Level 1.
• External review (ACA §2719 / ERISA §503): After exhausting internal options, request independent external review — typically within four months of the final adverse determination. External reviewers are not bound by Aetna's internal policy and often reach different conclusions.
• Expedited review: If your condition is urgent, request expedited processing; decision required within 72 hours.

## Documentation to Gather

1. Diagnosis confirmation: Current treating provider records with the specific diagnosis, onset history, and documented symptom severity using recognized clinical assessment tools. 2. Prior-treatment history with outcomes: A comprehensive chronological list — from your chart — of every treatment tried, the duration, and the documented clinical response or reason for discontinuation. Include medication trials, psychotherapy, and any other interventions Aetna's policy requires. 3. Clinical severity documentation: Recent clinical notes, validated symptom-scale scores, and functional-impairment documentation showing current severity. 4. Prescriber medical-necessity letter: A letter from your treating clinician addressed to Aetna's appeals unit, citing Aetna's own criteria one by one and explaining how your case meets each. The clinician should reference the applicable specialty guideline organization to contextualize the recommendation. 5. Aetna's Clinical Policy Bulletin: Download it from Aetna.com so you know exactly which criteria to address.

## Criteria-Mapping Structure

Create a table with four columns: (1) Aetna Criterion (quoted exactly from the policy bulletin), (2) How Your Case Meets It, (3) Supporting Document, (4) Date of Document. Submit this table as the cover exhibit of your appeal package. Reviewers can then verify each criterion in minutes rather than searching unstructured records. Close the letter by requesting that if any criterion is considered unmet, Aetna identify it specifically so you may supplement the record — this forces a more precise denial if the appeal is not granted.