How to appeal an Aetna mental health & behavioral health denial

The framework that applies to your appeal

Federal law gives you the right to a full and fair internal appeal, then an external review by an independent third party.

Aetna-specific note: Owned by CVS Health since 2018. CVS Caremark is the PBM. Aetna ASA administers self-funded ERISA plans. Meritain Health is Aetna's TPA brand.

What Aetna's policy requires for mental health & behavioral health

Cited policy: Aetna Clinical Policy Bulletin — Transcranial Magnetic Stimulation

Adults with MDD, failure of >=4 antidepressants from >=2 classes at adequate dose/duration in current or past episode, plus psychotherapy trial.

How Aetna denies mental health & behavioral health — and how to counter it

Where Aetna pushes back: 1) Reauth denied after 20-30 sessions for 'insufficient response'; 2) Step therapy not met; 3) Maintenance TMS not covered after acute course.

Counter-arguments that hold up: Quote CPB 0469 back to them — current OR past episode meets the trial requirement. For continuation: Carpenter 2012 — response often by session 20-30, full benefit at 36. For maintenance: Wilson 2022 + Philip 2016 evidence for relapse prevention; APA continuation/maintenance guidance.

What Aetna typically denies for mental health & behavioral health

Across Aetna's commercial and Medicare books, denials cluster around a small number of patterns. For mental health & behavioral health, expect:

• UM-2575 medical necessity denials
• Prior auth absent
• Step therapy on specialty drugs
• Out-of-network ER reduction

Treatments most often denied in this category

These are the mental health & behavioral health treatments most often flagged for prior auth, step therapy, or medical necessity review:

• Inpatient psych
• Residential
• PHP
• IOP
• Outpatient therapy
• TMS

How to submit the appeal to Aetna

1. Read the denial letter — note the exact denial reason code and the appeal deadline (180 days from the date on the letter).
2. Gather supporting documentation: physician letter of medical necessity, relevant clinical notes, peer-reviewed citations supporting the treatment for your indication, and the policy or coverage document Aetna cited in the denial.
3. File the appeal through Aetna's portal (members: https://www.aetna.com ; providers: https://www.aetnaprovider.com). Standard decision returns within 30 days; expedited urgent appeals return within 72 hours.
4. If denied again, request external review by an independent reviewer within 4 months of the final internal denial. In CT, the state insurance department coordinates external review for fully-insured plans; ERISA self-funded plans use a federal external review through DOL/EBSA.

Clinician or prior-auth team handling this on the practice side? See Aetna's prior-authorization criteria by drug: Aetna PA criteria on ApprovalHelp.