Aetna denied your claim? Here’s what to do
Summary: Aetna denials usually cite a Clinical Policy Bulletin number — look it up on aetna.com so your appeal answers the exact criteria. A Aetna denial is not final. Roughly half of internal appeals succeed — but you typically have just 180 days from the date of the denial to file, so move quickly and put everything in writing.
What to gather first
- Your denial letter and the Explanation of Benefits (EOB), which state the exact reason.
- Your member ID, the claim number, and your plan documents (Evidence of Coverage / Summary of Benefits).
- The original bills and medical records for the service.
- A letter of medical necessity from your doctor (or notes you can ask them to provide).
- Dated notes from every call with Aetna or your provider.
Why Aetna denied your claim
- A coding or paperwork error by the provider (the most common cause).
- The service was billed as "not medically necessary" or experimental.
- Missing prior authorization or a referral.
- The claim was sent to the wrong plan or filed after the timely-filing window.
- An out-of-network provider where Aetna expected in-network.
Calling Aetna: what to expect
Aetna’s line is 1-800-872-3862; member services is typically Mon–Fri, roughly 8am–6pm in your time zone; some plans staff weekends.
To reach a person: enter or say your Aetna member ID, then say "claims" for a denial, or "authorization" for a prior-auth question, then say "representative" to reach a person. Menus change — if yours does not match, say "representative" at any prompt.
Self-service runs through Aetna Health app / aetna.com (https://www.aetna.com); the written route is the Aetna Member Complaint and Appeal Form (available on aetna.com; a letter with the same details is also accepted); and you may see these names on your paperwork: Aetna Health app, CVS Caremark (pharmacy).
Step by step: what to do
- Read the denial letter and EOB for the exact denial code and reason — that is your roadmap.
- Call Aetna at 1-800-872-3862 (enter or say your Aetna member ID, then say "claims" for a denial, or "authorization" for a prior-auth question, then say "representative" to reach a person) and ask for the specific plan language the denial relies on.
- Request a full copy of your plan documents and the claim file.
- Ask the provider to correct any coding error and resubmit, if that is the cause.
- Write an appeal letter with your name, member ID, and claim number; state plainly why it should be covered and attach your supporting records.
- File the written internal appeal through the appeal address on your denial letter or the Aetna member portal before the 180 days from the date of the denial deadline (keep proof of the date sent).
- If the internal appeal is denied, request an independent external review by a reviewer who does not work for Aetna.
Common mistakes to avoid
- Treating the first phone "no" as final — denials must be appealed in writing.
- Missing the 180 days from the date of the denial appeal deadline.
- Appealing without citing the specific denial code and plan language.
- Not asking your doctor for a letter of medical necessity, which often decides the appeal.
- Stopping after the internal appeal instead of using your external-review right.
What to say when you call Aetna
- I’m calling about a denied claim and I want to start a formal appeal.
- Please tell me the exact denial code and the plan provision it’s based on.
- I’m requesting a full copy of my plan documents and claim file.
- Please confirm the appeal deadline and the address or portal for my written appeal.
Aetna-specific things to know
- Aetna denials usually cite a Clinical Policy Bulletin number — look it up on aetna.com so your appeal answers the exact criteria.
- If your plan is through an employer, Aetna may only administer it; ask whether the appeal decision rests with Aetna or the plan sponsor.
- Aetna is part of CVS Health, so pharmacy denials come from CVS Caremark and have their own appeal process and phone line.
- Aetna Medicare Advantage members use a different member services number and a Medicare appeals timeline (60 days, not 180).
- The Aetna Health app shows claim status and lets you message member services; written messages are a paper trail.
- Aetna’s clinical policy bulletins (CPBs) are public — a denial usually cites one, and reading it tells you exactly what documentation would overturn it.
Know your rights
You have the right to a written explanation of any denial, to a full copy of your plan documents, and to appeal — first internally, then through an independent external review.
Regulator: your state Department of Insurance (and the federal No Surprises Act). If the internal appeal fails, request an external review and file a complaint with your state Department of Insurance.
If Aetna will not move, the escalation paths that carry weight:
- Ask for a second-level appeal if your plan offers one, or an expedited appeal when a delay would harm your health.
- Request independent external review — Aetna uses an independent review organization once internal appeals are done.
- File with your state Department of Insurance, or the Department of Labor for employer plans.
Don’t sit through Aetna’s phone menu
Karen calls Aetna at 1-800-872-3862, works through the phone tree, and waits on hold for you. Once she reaches a human representative, she adds you to the call.
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Frequently asked questions
How long do I have to appeal a Aetna denial?
You generally have 180 days from the date of the denial to file an internal appeal. Confirm the exact window in your denial letter and send your written appeal before it closes.
How likely is it to win?
Better than people expect — studies find roughly 44% of internal appeals succeed, and more are overturned at external review. Denials caused by a coding error or missing documentation are especially winnable.
How fast does Aetna have to respond?
For care you have not received yet, insurers generally must decide within 30 days; for care already provided, within 60 days; and for urgent care, within 72 hours.
What if the internal appeal fails?
You can request an external review, where an independent third party who does not work for Aetna makes a binding final decision.
Can Karen call Aetna for me?
Yes. Karen calls Aetna at 1-800-872-3862, asks for the denial code and plan language, and reports back exactly what you need for your appeal.
Do Aetna Medicare members appeal the same way?
No. Aetna Medicare Advantage plans follow Medicare appeal rules — a 60-day window and a different member services number. Use the number on your Medicare card.
What is an Aetna Clinical Policy Bulletin?
A public document setting out when Aetna considers a service medically necessary. Denials usually cite one, so it tells you exactly what your appeal needs to show.
Where do I file an Aetna appeal?
At the address on your denial letter, or through the Aetna Health app or aetna.com. Keep proof of the date you sent it.