The Short Answer: Appealing Costs Nothing
Filing an insurance appeal is free. Under federal law (45 C.F.R. §147.136), your insurer must provide an internal appeals process at no charge, and independent external review is free in most states — a handful permit a nominal fee, typically capped around $25 and waived for financial hardship.
So the real question is not what it costs to appeal. It is what it costs to get help appealing — and whether you need it. Here is what every option actually costs.
Free Options
1. Do it yourself — $0
You have the legal right to file your own appeal, and self-filed appeals succeed at meaningful rates: roughly 50 percent of internal appeals and 45 percent of external reviews end with the denial overturned. What it costs you is time — typically 5 to 15 hours spread across reading the denial, requesting your claim file, getting a letter of medical necessity from your doctor, drafting the appeal, and following up.
DIY works well when the denial reason is administrative (missing documentation, a coding error, a missed prior authorization) or when your physician is willing to write a strong medical necessity letter.
2. Your state insurance department — $0
Every state Department of Insurance operates a consumer assistance line staffed by people whose job is to help you. They will explain your appeal rights, tell you your exact filing deadline, walk you through external review, and — importantly — investigate your insurer if it missed deadlines or refused to produce your claim file. Regulator inquiries have a way of resolving stalled claims. Many states also fund independent Consumer Assistance Programs that provide free one-on-one appeal help.
3. Your doctor's office — $0
Most specialty practices have staff who handle prior authorizations and peer-to-peer reviews daily. A peer-to-peer review — your physician speaking directly with the insurer's medical director — often reverses a denial in a single phone call, before any formal appeal is filed. Ask your prescriber's office to request one. It costs you nothing and it is the fastest path available.
4. AskBenji — $0
AskBenji is a free AI tool built for exactly this. Upload your denial letter at askbenji.co/denial and within minutes you get a plain-language explanation of why you were denied, the federal and state provisions that apply, your deadlines, and a complete appeal letter written in your voice and ready to send. No account, no payment, no PHI stored — documents are deleted after 24 hours.
It compresses the 5–15 hour DIY path into roughly 20 minutes, which is why it makes sense as the first step regardless of what you do next.
Paid Options
Patient advocates — $75–250/hour
Independent patient advocates (often nurses or former insurance claims professionals) manage appeals end to end: reviewing records, coordinating with your physician, drafting the appeal, and handling insurer follow-up. Typical rates run $75 to $250 per hour, with many charging flat fees of $500 to $2,500 per case. A straightforward appeal usually takes an advocate 3 to 8 hours.
Some advocates work on contingency, taking 20 to 35 percent of the amount they save you. That structure aligns incentives well on large claims.
Medical billing advocates — $50–200/hour or 20–35% contingency
Billing advocates specialize in bills rather than coverage denials: auditing itemized charges, catching coding errors, and negotiating balances down. They typically charge $50 to $200 per hour or take a percentage of savings. This is the right specialist when your problem is an inflated hospital bill rather than a denied claim — see How to Negotiate a Medical Bill for what you can do yourself first.
Healthcare attorneys — $200–500/hour
Attorneys are the right call when a claim is large, when your plan is self-funded and you are heading toward ERISA litigation, when the insurer has acted in bad faith, or when denial of care is causing serious ongoing harm. Rates typically run $200 to $500 per hour, with initial consultations often free. Many ERISA attorneys take strong cases on contingency at 25 to 40 percent of recovery.
One caveat: under ERISA, courts generally review only the record built during the internal appeal. If litigation is plausible, involve an attorney before you exhaust your appeals, not after.
Comparison: What Each Option Costs You
| Option | Cost | Your time | Typical success rate | Best for |
|---|---|---|---|---|
| DIY | $0 | 5–15 hrs | ~50% internal / ~45% external | Administrative denials, engaged physician |
| AskBenji (free AI) | $0 | ~20 min | DIY rates, with stronger documentation | Everyone, as a first step |
| Patient advocate | $75–250/hr or $500–2,500 flat | 1–3 hrs | Higher on complex clinical cases | Claims above ~$5,000; rare disease; multiple denials |
| Healthcare attorney | $200–500/hr or 25–40% contingency | 2–5 hrs | Highest on litigable cases | Claims above ~$25,000; ERISA suits; bad faith |
When Paying for Help Makes Sense
A practical set of thresholds:
- Under $1,000: DIY or a free AI tool. Paid help rarely pencils out.
- $1,000–$5,000: Start free. Escalate to an advocate only if the second-level denial holds.
- $5,000–$25,000: A patient advocate is usually worth it. A $1,500 fee against a $15,000 claim is a strong expected return.
- Above $25,000, or ongoing treatment: Consult an attorney — many will assess your case free and take it on contingency.
Complexity matters as much as dollars. Rare-disease and experimental/investigational denials, mental health parity violations, and repeated denials of the same treatment all justify professional help earlier, because they turn on evidence and legal argument rather than paperwork.
The ROI Math
Denied claims typically range from about $1,000 to $50,000, and specialty drug and inpatient denials routinely exceed that. Run the expected value: a $1,500 advocate fee on a $20,000 claim with a 50 percent chance of reversal has an expected return of roughly $10,000 against $1,500 spent — better than 6 to 1.
The same math explains why the free step should always come first. Because appeals cost nothing to file and reverse denials about half the time, the expected value of simply appealing is strongly positive at every claim size. The only guaranteed loss is not appealing at all — and fewer than 1 percent of denied marketplace claimants ever do.
The Sensible Sequence
- Ask your doctor's office for a peer-to-peer review. Free, fast, often decisive.
- Run your denial through AskBenji. Free, ~20 minutes, produces a complete appeal letter with the applicable regulations cited.
- File the internal appeal within your 180-day window.
- File for external review within four months of the final internal denial. Free in most states, and the decision binds your insurer.
- Bring in paid help if the claim is large or complex and the free path has stalled — with your documentation already assembled, an advocate or attorney needs fewer billable hours.
Frequently Asked Questions
How much does it cost to appeal an insurance denial?
Filing an appeal costs $0. Federal law requires insurers to provide internal appeals free of charge, and external review is free in most states (a few allow a nominal fee, typically up to $25, waived for hardship). Costs arise only if you hire help: patient advocates charge $75–250/hour and healthcare attorneys $200–500/hour.
Can I get free help appealing an insurance denial?
Yes. Free help is available from your state Department of Insurance consumer assistance line, state-funded Consumer Assistance Programs, your physician's office (including peer-to-peer reviews), disease-specific nonprofit foundations, and free AI tools such as AskBenji, which drafts a complete appeal letter from your denial at no cost.
How much does a patient advocate cost?
Independent patient advocates typically charge $75 to $250 per hour, or flat fees of $500 to $2,500 per case. Some work on contingency, taking 20 to 35 percent of the amount they save you. Hospital-employed advocates and nonprofit advocates are free but may have institutional conflicts.
Is it worth hiring an attorney to fight an insurance denial?
Generally when the claim exceeds roughly $25,000, when your employer plan is self-funded and ERISA litigation is on the table, or when the insurer has acted in bad faith. Most healthcare attorneys offer free initial consultations and many take strong cases on contingency. Because ERISA courts usually review only the administrative record, consult an attorney before you exhaust your internal appeals.
Do I have to pay anything to request an external review?
In most states, no. A small number permit a nominal filing fee — typically capped around $25 and waived for financial hardship. The independent reviewer's decision is binding on your insurer, which makes external review the highest-leverage free step available to you.
Start With the Free Step
AskBenji is free at askbenji.co/denial. Upload your denial letter and get a plain-language analysis, the regulations and deadlines that apply to your case, and a ready-to-send appeal letter in your own voice. Documents are processed ephemerally and deleted after 24 hours — no PHI stored, no account required.
If your case later needs a human, we can connect you with a paid advocate and transfer your analysis so you are not starting over.
Related reading: Your Rights When Insurance Denies Your Claim: A State-by-State Guide, What to Do When Your Insurance Denies a Prior Authorization, and How to Read Your Insurance Denial Letter.