In short
If your insurer denies a claim, you have the right to appeal. Read the denial reason, file an internal appeal with supporting documents, and if that fails, request an independent external review. Many denials are overturned, so it is worth pursuing.
A denial is the start of a conversation, not the end
When an insurer refuses to pay for care, it’s called a denialWhen your insurer refuses to pay a claim. You usually have the right to appeal.. It can feel final and intimidating. It is neither. Under federal rules, you have the right to ask your insurer to reconsider (an internal appealA formal request asking your insurer to reconsider a denied claim. Many denials are overturned.) and, if that fails, to have an independent third party review the decision (an external review).
Step 1: Find out exactly why
Your EOBA summary from your insurer showing what was billed, what the plan paid, and what you may owe. It is not a bill. or denial letter includes a reason code or short explanation. Common reasons include:
- The service was considered “not medically necessary.”
- It was out of networkProviders without a contract with your plan. Your costs are usually higher, and some plans do not cover them at all..
- Prior authorizationYour insurer's approval before it will cover certain care, tests, or medicines. Without it, the claim can be denied. (advance approval) was missing.
- A simple coding or paperwork error.
Many denials are fixable clerical problems, not true rejections of your care.
Step 2: Gather your documents
- The denial letter and matching EOB
- Your plan’s Summary of Benefits and Coverage
- A letter of support from your clinician explaining why the care was needed
- Any relevant medical records
Step 3: File the internal appeal
- Check the deadline. You generally have 180 days from the denial to file an internal appeal.
- Write a clear, dated letter. State what was denied, why you disagree, and what you’re asking for. Attach your documents.
- Send it the way your plan requires and keep proof (a copy and a tracking number).
- For urgent situations, you can request an expedited appeal, which is decided much faster.
Step 4: Request an external review if needed
If the internal appeal is denied, you can ask for an external review by an independent organization. Their decision is binding on the insurer. Your denial letter must tell you how to start this and the deadline (often four months).
Step 5: Keep records and ask for help
Log every call: date, name, reference number. If you’re stuck, your state’s Consumer Assistance Program or insurance department can help, free of charge.
Don’t give up early
Appeals take patience, but a large share are overturned. Persistence is one of the most powerful (and underused) patient tools there is.
Frequently asked questions
How long doA medical doctor — "MD" or "DO" — with four years of medical school plus a multi-year residency in a chosen field. I have to appeal a denial?
Deadlines vary by plan but are often 180 days from the denial. Check your denial letter and act early.
What is the difference between an internal appeal and an external review?
An internal appeal asks the insurer to reconsider. An external review sends the decision to an independent third party whose ruling the insurer must follow.
Can my doctor help with the appeal?
Yes. A letter of medical necessity from your providerAnyone licensed to give you medical care — a physician, nurse practitioner, or physician assistant. Clinics use "provider" as a catch-all for whoever is caring for you., along with records, can strengthen your case considerably.
What if I need the care urgently?
You can request an expedited appeal, which insurers must decide quickly when a delay would seriously risk your health.