Health insurance claim appeals give you two chances to overturn a denial. First, you file an internal appeal with your plan within 180 days of the denial notice. If the plan still says no, you can ask for an external review by an independent reviewer within 4 months. In the end, the insurer must accept that reviewer's decision.
- You have 180 days from the denial notice to file an internal appeal.
- Your plan must decide within 30 days for care you haven't had yet, or 60 days for care you already got.
- You can request an external review within 4 months of the final denial, and a standard review ends within 45 days.
- The federal external review process is free, while state or contracted reviewers can charge no more than $25.
- KFF found that people appealed fewer than 1% of denied in-network Marketplace claims in 2024.
Why health insurance claim appeals are worth filing
Denials are common, yet appeals are rare. For example, KFF studied in-network claims for insurers on HealthCare.gov in 2024. Here is what it found.
Denial rates also ranged from about 3% to 36% across insurers. So the plan you pick affects how often you may face a denial. Meanwhile, the top named reasons were administrative errors at 25%, excluded services at 13%, and missing prior approval or referrals at 9%.
Many of those reasons are fixable. A coding error or a missing record often needs only a corrected claim. In other words, health insurance claim appeals are not just for big medical disputes. They also fix everyday mistakes that would otherwise cost you money.
Your best first step by denial reason
Before you write anything, read the reason on your denial notice or Explanation of Benefits (EOB). Then match it to the right first move.
| Denial reason | Best first step |
|---|---|
| Billing or coding error | Ask the provider to correct and resend the claim |
| Missing information | Send the records, then confirm by phone that they arrived |
| No prior approval | Have your doctor request approval, then file an appeal if needed |
| Not medically necessary | File an internal appeal with a letter from your doctor |
| Service not covered | Check your plan documents, then appeal if they support you |
For the full path a claim takes, see our guide to every step from visit to paid claim. Also, if a claim has stalled rather than been denied, learn what each portal status means first.
How to file an internal health insurance claim appeal
An internal appeal asks your plan to take a fresh look at its own decision. Federal rules give you at least 180 days from the denial notice to file. So follow these steps.
- Read the denial notice
It must state the specific reason and the plan rule behind it.
- Request your claim file
Job-based plans must give you the documents relevant to your claim free of charge.
- Get your doctor's support
A letter that explains why you need the care carries real weight.
- Complete the plan's forms
Use your insurer's appeal form, or else write a letter with your name, claim number and member ID.
- Send copies, then follow up
Keep the originals, and note the date, name and details of every call.
How long your plan has to decide
| Type of appeal | Decision deadline |
|---|---|
| Urgent care | 72 hours for job-based plans |
| Care you haven't received yet | 30 days |
| Care you already got | 60 days |
If your situation could seriously harm your life or health, ask for an expedited appeal. In that case, HealthCare.gov says you can request an external review at the same time.
Your rights during the review
For job-based plans, the Department of Labor sets clear rules. The reviewer can't be the person who denied your claim, or that person's subordinate. Also, the reviewer must give no weight to the first decision. When the denial involves medical judgment, the plan must consult a qualified health professional. Finally, a plan can require no more than two levels of internal appeal.
A licensed Vivna agent can help you read the denial, find the right contacts and plan your next step, at no cost to you.
What to put in your appeal letter
A strong letter is short, specific and backed by proof. In fact, reviewers move faster when they can see your case in one page. Use this outline.
- Your name, member ID, claim number and date of service
- The denial reason, quoted from the notice
- Why you needed the care, in plain words
- Also, the plan rule or benefit that supports you
- The outcome you want, such as full payment of the claim
- A list of what you attached, like records and your doctor's letter
Tips for a stronger insurance appeal
First, stay calm and factual, because anger doesn't move a reviewer. Next, cite the exact plan language when you can find it. Then attach your doctor's letter of medical necessity for any medical judgment denial. If someone else files for you, include a signed request that names them.
Call the provider's billing office before you write a word. Since administrative errors lead KFF's list of named denial reasons, a corrected claim may solve the problem in days. In addition, the billing office often knows exactly which record the plan wants.
Many denials turn on what your plan covers in the first place. So review which services ACA plans must cover and how billing codes and charges work before you write.
External review: the next step after health insurance claim appeals
If your plan upholds its denial, an independent reviewer can look at the case. HealthCare.gov says external review covers denials that involve medical judgment. It also covers treatments the plan calls experimental, plus a cancellation based on claimed false or incomplete application information.
- File within 180 days
- Decision in 30 or 60 days
- A new reviewer inside the plan
- File in writing within 4 months
- Standard decision within 45 days, or 72 hours if urgent
- The insurer must accept the result
Your final denial letter names the group that handles your review. Your state may run the process, or HHS may oversee it. Either way, the federal process is free, and other reviewers can charge no more than $25.
How to request a federal external review
When HHS runs the process, HealthCare.gov lists a few ways to file. You can submit online through the federal reviewer's secure website. Or you can call 1-888-866-6205 for a request form, then fax or mail it back. If your state runs the review instead, your EOB or final denial lists the contact to use. Either way, include a copy of the final denial and any new records.
Missing a deadline can end your right to challenge the denial. So mark both dates on your calendar the day each notice arrives: 180 days for the internal appeal, then 4 months for external review.
Read the denial reason first, because it tells you which fix to use.The rule our licensed agents repeat most about denied claims
If denials keep happening
Repeat denials can be a sign of a narrow network or a plan with strict prior approval rules. Our guide to what out-of-network care really costs explains one common cause. When Open Enrollment arrives, you can then compare individual health plans in your ZIP code. Our checklist to move to a new carrier without a gap shows the timing. For more answers, see our library of health insurance answers, our steps for fixing common health plan problems, or call 888-730-6001.
Health insurance claim appeals: FAQs
How long do I have to file an insurance appeal?
You have 180 days, about six months, from the date you receive the denial notice to file an internal appeal. If your plan upholds the denial, you then have 4 months from the final notice to request an external review. Mark both dates as soon as each letter arrives, since a missed deadline can end your right to challenge.
How long does an appeal take?
For an internal appeal, your plan must decide within 30 days for care you haven't received yet. For care you already got, it has 60 days. Urgent appeals for job-based plans get 72 hours. Next, a standard external review must finish within 45 days, while an expedited review takes 72 hours or less.
Do health insurance appeals actually work?
Sometimes. KFF found that insurers upheld 66% of appealed in-network denials on HealthCare.gov in 2024. So an appeal is no sure thing, yet filing one with your plan costs nothing. Also, many denials come from billing errors that a corrected claim fixes without an appeal. Because so few people appeal, many denials simply stand unchallenged.
Can my doctor file the appeal for me?
Yes. You can name an authorized representative, such as your doctor, though the plan may require a signed form. For urgent claims under job-based plans, your treating doctor can act for you without that form. Either way, your doctor's letter explaining why you need the care often makes the strongest part of the appeal.
Do I need a lawyer to appeal a denied claim?
No. Most people file internal appeals and external reviews on their own, using the plan's forms or a simple letter. The federal external review process is free. However, for a large or complex denial, some people choose a lawyer or a patient advocate. A licensed agent can also help you understand the notice.
Vivna's licensed agents compare plans from 50+ carriers. Call Monday through Friday, 9am to 6pm.
Sources
- HealthCare.gov: Internal appeals
- KFF: Claims denials and appeals in ACA Marketplace plans in 2024
- HealthCare.gov: External review
- U.S. Department of Labor: An Employer's Guide to Health and Disability Benefit Claims
Vivna Insurance is a licensed, independent health insurance agency (NPN 19168641). We are not affiliated with HealthCare.gov or any government agency. Plan availability, networks and benefits vary by state and change over time.
Related guides
Find Local Health Insurance Help
Plans, prices and help programs change by state and even by county. These local guides show what is available near you.
More local help: the Florida health insurance guide, plus guides for Texas, Georgia, North Carolina and every state we serve.
Prefer to talk it through? Call 888-730-6001 Monday through Friday, 9 a.m. to 6 p.m. Eastern, for free help from a licensed agent.