How to appeal an Aetna sickle cell & thalassemia 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 sickle cell & thalassemia

Cited policy: Aetna Clinical Policy Bulletin / 0996 — Gene Therapy and HSCT for Hemoglobinopathies

FDA-approved gene therapy at COE. Severe SCD genotype + ≥2-4 VOCs (varies). Fertility counseling.

How Aetna denies sickle cell & thalassemia — and how to counter it

Where Aetna pushes back: 1) ≥4 VOC threshold (exceeds FDA label); 2) Fertility preservation not documented; 3) HU intolerance unclear.

Counter-arguments that hold up: Cite FDA label 2-VOC criterion + ASH 2020. Submit fertility preservation note (sperm/oocyte cryopreservation). Document HU dose/duration/intolerance with labs. ERISA medical-necessity standard.

What Aetna typically denies for sickle cell & thalassemia

Across Aetna's commercial and Medicare books, denials cluster around a small number of patterns. For sickle cell & thalassemia, 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 sickle cell & thalassemia treatments most often flagged for prior auth, step therapy, or medical necessity review:

• Casgevy
• Lyfgenia
• Zynteglo
• Allogeneic HSCT
• Hydroxyurea
• Adakveo

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.