How to appeal an Aetna cancer treatments 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 cancer treatments

Cited policy: Aetna Clinical Policy Bulletin - Proton Beam and Neutron Beam Radiotherapy

Covers pediatric, CNS, ocular, chordoma/chondrosarcoma of skull base/spine, re-irradiation as medically necessary. Considers proton experimental for most adult prostate, breast, lung, GI absent specific criteria.

How Aetna denies cancer treatments — and how to counter it

Where Aetna pushes back: 1) Experimental/investigational for adult prostate, breast, lung, GI; 2) IMRT considered equivalent; 3) Off-label radiation indication; 4) Insufficient dosimetric comparison.

Counter-arguments that hold up: CPB 0270 explicitly covers re-irradiation, pediatric, and tumors near critical structures — quote bulletin text and document anatomic proximity. Provide dosimetric comparison showing IMRT exceeds spinal cord/optic chiasm/cochlear/hippocampal tolerance. ASTRO Model Policy Group 1 listing for the patient's cancer. PCG/MD Anderson lung studies for comparative effectiveness.

What Aetna typically denies for cancer treatments

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

• Checkpoint inhibitor
• CAR-T
• Targeted oral
• ADC
• Proton therapy
• PET imaging

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.