Built for Medicare Advantage patients fighting prior auth, rehab, and surgery denials. Upload your denial letter and see your appeal deadline, appeal strength, and our plan of attack free. Then $39 flat has us mail your appeal certified, follow up at Day 14, file your state complaint at Day 30, and request external review at Day 45.
Built by an M.S. in Health Informatics after his own MRI was denied three times. 80.7% of Medicare Advantage appeals succeed — fewer than 12% of patients ever file one.
Tell us a few details, upload your denial letter, and see your appeal deadline, appeal strength, and the argument we would make. Free. Pay only if you want us to file and escalate it for you.
Free analysis of your denial first. $39 only if you want us to file and escalate it for you.
Tell us about your denial. We handle literally everything else.
A few quick details, then upload or paste your denial letter. Free, under two minutes.
Your denial type, your appeal deadline, your appeal strength, and how we would fight it. Before you pay anything.
One-time. Your appeal is written, printed, and mailed certified to your insurer on Day 1.
Follow-up Day 14, state complaint Day 30, external review Day 45. You do nothing.

Kov Thirumavalavan, M.S., M.B.A. — Founder
I suffered a major back injury during college, and for the past ten years, I've been dealing with chronic back pain. I've had three MRIs since then, and I know firsthand how hard it is to get medically necessary procedures approved by insurance companies.
Peace of mind is the greatest gift the healthcare system can give a patient. But for the millions of us who have been denied care, the appeals process is deliberately overwhelming — confusing deadlines, complex regulations, and letters that go unanswered. Most people give up. I decided it was time to do something about it.
That's why I created DenyBack. I wanted to give power back to the insured and make it possible for anyone who's been denied medical care to fight back — without having to figure it all out alone.
After you upload your denial letter and pay $39, this is your dashboard. We handle everything from here.
UnitedHealthcare · Medical Necessity · Claim: $4,850.00
Step 1 of 4 Complete
Your formal appeal was mailed to UnitedHealthcare on April 7, 2026. They are legally required to respond within 30 days.
Next: Your Follow-Up Letter will be automatically mailed on April 21, 2026. You don't need to do anything.
Formal Appeal LetterSent
Day 1 · Mailed 4/7/2026
Follow-Up LetterScheduled
Day 14 · April 21, 2026
Commissioner ComplaintScheduled
Day 30 · May 7, 2026
External Review RequestScheduled
Day 45 · May 22, 2026
Formal Appeal Letter
4-page letter with state-specific statutes, insurer response deadline, and your personalized argument
Follow-Up Letter
References your original appeal, cites regulatory non-compliance, warns of commissioner complaint
Commissioner Complaint
6-page formal complaint to your state's Department of Insurance with full timeline and statutes
External Review Request
Request for independent medical review — their decision is legally binding on your insurer
You don't need to do anything.
Every document is physically mailed to your insurer via USPS certified mail. You get an email confirmation for each one.
The ones who fight back usually win. Almost nobody does. DenyBack is for everyone in between.
4.1M
Medicare Advantage prior authorization requests denied in 2024
11.5%
of those denials were appealed
80.7%
of appeals were partially or fully overturned
Source: KFF, Medicare Advantage Insurers Made Nearly 53 Million Prior Authorization Determinations in 2024, January 2026.
$39
One-time payment. We handle everything.
Patient advocates charge $100–500/hr. We charge $39 total.
Yes — Medicare Advantage is exactly who DenyBack is built for. MA plans denied 4.1 million prior authorization requests in 2024, and the process rewards the patients who actually file: 80.7% of appeals are partially or fully overturned. DenyBack handles the full MA appeal and 45-day escalation. Note that Original Medicare (fee-for-service) and Medicaid use different appeal processes — if you're on one of those, your state's free SHIP counselor offers help with these.
You can — most insurers have an "appeal" button, and the first-level appeal often goes through it. But a portal submission stops inside the insurer's own system. It doesn't create the certified-mail record state regulators require. It doesn't file your external review request with the independent review organization. And it doesn't follow up on Day 14 or escalate on Day 30 if the insurer simply doesn't respond — which happens often. DenyBack runs the full 45-day escalation: certified mail at every step, a documented record, and the commissioner complaint and external review filed for you. The portal gets you one appeal. DenyBack gets you four — each one harder to ignore.
DenyBack works for all common health insurance denial types including prior authorization denials, medical necessity denials, coverage denials, out-of-network denials, and denials for experimental or investigational treatments. Our escalation packages are tailored to your specific denial reason and state regulations.
No. DenyBack is a document preparation and submission service acting at the user's direction, not a law firm. We do not provide legal advice, legal representation, or attorney-client relationships. Our service generates AI-assisted document templates based on your inputs and publicly available insurance regulations, which are reviewed and approved by you before submission. For complex legal matters, especially those involving ERISA plans or urgent medical situations, we recommend consulting a licensed attorney.
Your escalation package includes multiple levels of escalation. If your internal appeal is denied, you can file the external review request with your state's independent review organization. The commissioner complaint is the nuclear option — it puts your insurance company on notice with your state's Department of Insurance. Each step increases pressure on the insurer to reconsider.
Yes. You upload or paste your denial letter and we show you your denial type, your appeal deadline, an honest read on your appeal's strength, and a summary of the argument we would make. No payment and no card required. You pay the flat $39 only if you want us to actually write, mail, and escalate the appeal for you. We show you our thinking first because you should know what you're buying before you buy it.
Yes. You get a full refund any time before your first appeal letter is mailed, which goes out via certified mail on Day 1. Nothing has been sent on your behalf until then, so if you decide DenyBack is not the right fit, just email us and we will refund you in full. We would rather you feel confident than locked in.
The free analysis takes about a minute after you upload your denial letter. If you decide to proceed, your full document package is ready minutes after payment, and your appeal letter is mailed certified the same day you confirm your details. The actual appeal timeline depends on your insurer and state regulations, but internal appeals typically take 30-60 days for a decision.
You'll need your denial letter (or the key details from it), your insurance information (insurer name, plan type, member ID), and a brief description of why you believe the denial is wrong. The more detail you provide, the stronger your appeal documents will be.