Aetna Surgery Claim Denied: How to Appeal

Why Aetna Denies Surgery Claims

Aetna denies surgery claims on several grounds: the procedure is deemed not medically necessary, it is classified as cosmetic or investigational, prior authorization was not obtained, or the surgeon or facility was out of network.

Common Denial Reasons

• Not medically necessary: Aetna's clinical criteria were not met based on submitted documentation
• Prior authorization not obtained: The surgery required advance approval that was not requested or was denied
• Experimental or investigational: Aetna classifies the surgical technique as unproven
• Out-of-network provider: The surgeon or facility is outside Aetna's approved network
• Cosmetic classification: Aetna reclassified a reconstructive or functional surgery as cosmetic

Steps to Appeal

1. Identify the exact denial reason from Aetna's Explanation of Benefits (EOB) and denial letter
2. Request Aetna's clinical policy document for the specific CPT code billed
3. Have your surgeon write a detailed medical necessity letter citing peer-reviewed evidence
4. Challenge cosmetic classifications — submit functional documentation, photos, and surgeon's notes showing impairment
5. File an internal appeal within 180 days of the denial date
6. Request external independent review if the internal appeal is denied; external reviewers reverse Aetna decisions in a significant percentage of surgery cases

Documents Required

• Aetna EOB and denial letter with CPT codes
• Surgeon's operative report and pre-operative notes
• Letter of medical necessity from treating physician
• Diagnostic test results (imaging, pathology) supporting surgical intervention
• Clinical guidelines from relevant medical specialty societies
• Photos if cosmetic vs. reconstructive is in dispute

Frequently Asked Questions

Q: Can Aetna deny a surgery my doctor says I need? A: Yes, but your doctor's opinion is strong appeal evidence. Aetna must show its clinical criteria are more restrictive than published medical guidelines to uphold the denial at external review.

Q: What if the surgery already happened and Aetna denied the claim after the fact? A: File an appeal for retrospective review. The clinical necessity of the surgery is evaluated on its merits regardless of when Aetna reviews it.

Q: Does Aetna have to pay for surgery at an out-of-network facility in an emergency? A: Under the No Surprises Act, Aetna cannot bill you more than in-network rates for emergency surgery at an out-of-network facility.