The treatment your doctor ordered was denied. The letter says "not medically necessary," or "experimental," or "not a covered benefit," and the implication is that the decision is final. It is not. Insurers deny first and sort it out later because most people never appeal, and a large fraction of the appeals that are filed succeed. The denial is the start of a process the law guarantees you, not the end of the road.
This guide moves from easiest to most powerful: understand the denial, run the internal appeal, get your doctor on the phone with theirs, escalate to the urgent track if you cannot wait, and then reach the step insurers least want you to know about, the binding external review by a doctor who does not work for them. Watch the deadlines, because they are the one thing that can actually defeat you.
How to use this guide. Move fast and write everything down. Appeal deadlines are short, and if your health is at risk you can demand an expedited decision in days. Get the denial reason in writing first, then work the steps in order. Most denials that get appealed all the way to external review are overturned more often than people expect.
A. Understand the denial
1. Get the denial reason and your plan documents in writing
You are entitled to a written explanation of why the claim was denied and the specific plan provision or clinical criteria it relied on. Get it. Then request your plan's governing documents: the Summary of Benefits and Coverage and, for the real detail, the full plan document or Evidence of Coverage. The denial has to be measured against the plan's own language and criteria, and you cannot argue against a rule you have not read.
2. Know what kind of plan you have
Your appeal rights depend on your plan type. A fully-insured plan (the insurer bears the risk) and a marketplace/ACA plan are regulated by your state and the ACA, which guarantee internal appeal and external review. A self-funded employer plan (your employer bears the risk, the insurer just administers it) is governed by federal ERISA law and overseen by the U.S. Department of Labor rather than the state insurance commissioner. Most non-grandfathered plans of either type still owe you internal appeal and external review; knowing which you have just tells you which regulator to escalate to later. Your HR benefits office or the plan document will say.
B. The internal appeal
3. File the internal appeal, and mind the deadline
The first formal step is the internal appeal, where you ask the insurer to reconsider. You generally have up to 180 days from the denial to file, but do not use all of it. Submit a written appeal that quotes the plan's own criteria and explains, point by point, why your situation meets them. Attach the supporting records. Reference the denial letter's stated reason and rebut it directly.
4. Get the peer-to-peer review
Your treating physician can request a peer-to-peer review, a direct conversation with the insurer's medical director who issued or upheld the denial. This is often the fastest way to flip a "not medically necessary" denial, because it puts a doctor who knows your case in front of the doctor who denied it. Ask your physician's office to request it explicitly, and ask them to write a letter of medical necessity that ties your specific clinical facts to the plan's coverage criteria.
5. Use the expedited track if you can't wait
If waiting for the standard timeline would seriously jeopardize your health, you can request an expedited (urgent) appeal, which compresses the decision into as little as 72 hours, and you can often pursue the internal and external reviews simultaneously in urgent cases. Say the words "expedited appeal" and have your doctor document the urgency. Do not let a plan run you through the slow track when your condition is time-sensitive.
C. The step they hope you skip
6. Demand an external (independent) medical review
If the internal appeal fails, the ACA and most state laws give you the right to an external review by an independent physician who does not work for the insurer, and the result is binding on the insurer. This is one of the most effective and least-used patient rights in American healthcare. A neutral specialist looks at whether the treatment is medically appropriate, and if they side with you, the insurer must cover it.
Watch the external-review clock. You typically have only four months from the final internal denial to request external review, and missing it can end your options. The denial letter is supposed to tell you how and where to file. The moment an internal appeal is finally denied, calendar the external-review deadline and file well before it.
D. Escalate and reinforce
7. Bring in the regulator
If the insurer drags its feet or violates the timelines, escalate. For a fully-insured or marketplace plan, file with your state Insurance Commissioner, whose consumer office investigates denials and network problems and whom insurers must answer quickly. For a self-funded ERISA plan, the U.S. Department of Labor oversees your rights. Either way, a regulator complaint costs nothing and tends to make a stalled appeal move.
8. Stack it with a grievance and good documentation
Beyond the coverage appeal, insurers run a separate grievance process for conduct and service problems, which is worth filing if the denial came with bad behavior or misinformation. Throughout, keep a log of every call, every name, every reference number, and every deadline, and keep copies of everything you send. Organized paper is what wins appeals, and it is also what a regulator needs to act.
E. Symbolic closure
9. Send them their oath, printed on toilet paper
Insurance denials are usually the insurer's doing, not the doctor's. But when a physician rubber-stamped the denial, would not make the call, or could not be bothered to write the letter that would have gotten you covered, there is a gap that an overturned claim never quite fills. This is the option this site exists to provide. You can mail the physician the Hippocratic Oath, printed on a triple-ply novelty toilet paper roll, through USPS, with your return address visible. It is satirical commentary protected by the First Amendment, and it is not a substitute for the appeal.
Ten percent of every sale of the Hippocratic Oath roll goes to a patient-advocacy organization. The roll is available at shop.thelastwipe.com.
What Not To Do
- Don't treat the denial as final. The appeal process is a legal right, and appeals succeed far more often than people assume.
- Don't miss the deadlines. The 180-day internal-appeal window and the four-month external-review window are the things that actually end cases.
- Don't appeal from memory. Quote the plan's own criteria and rebut the denial's stated reason point by point, with records attached.
- Don't skip the expedited track when your health is at risk. You can force a decision in days.
- Don't make threats or dox anyone. Send a single roll with your return address through USPS, and stop. That's the legal line.
- Don't go it alone if it's complex. State consumer-assistance programs and patient-advocacy nonprofits help with appeals for free.
Read the denial, quote the plan back at them, put your doctor on the phone with theirs, and ride it to external review. The treatment your doctor ordered is worth the paperwork.