External review request letter for a health plan denial
Updated October 1, 2026 · How we write our guides
When to use it
Use this letter to ask an independent reviewer to look at your health plan's final denial. You have 4 months from the final denial to ask. A standard review takes up to 45 days, and an urgent one up to 72 hours. If the reviewer sides with you, your plan must accept the decision.
Your plan turned down your internal appeal. You can often take your case to an independent review organization next. It isn't part of your plan, and your plan must accept its decision. Our guide to external review for health insurance explains how the steps fit together.
When to use this letter
Use it after your plan's final denial, when the denial involves medical judgment. That includes:
- Whether the care was medically necessary
- The level of care or the setting, like inpatient or outpatient
- Whether a treatment is experimental or investigational
- A plan cancelling your coverage because it says your application was wrong or incomplete
You usually finish the internal appeal first. Our insurance appeal letter covers that step. In urgent situations, you can file both at the same time.
Medicare, Medicare Advantage, and Medicaid use their own appeal systems. If you have 1 of those, follow the steps on your notice. Our guide on how to appeal an insurance denial explains the differences.
Check your deadline and where to send it
You have 4 months from the date you get the final denial. Our appeal deadline calculator can help you count.
Your final denial letter or explanation of benefits (EOB) gives the contact for your review. It may be your plan, your state, or the federal process. Some processes have their own form. If yours does, fill it out and attach this letter.
What to fill in
- Review contact and address: copy them from your final denial letter.
- Denial reason: use the words from the final denial.
- New evidence: list anything your plan didn't see, like a new letter from your doctor. If there's nothing new, write "None."
- The urgent paragraph: keep it only if your doctor believes waiting could seriously harm your health. If not, delete the paragraph that starts "Urgent request."
Your letter
Highlighted words are blanks you haven't filled in yet.
What to attach
Send copies, not originals. Include:
- The final denial letter
- Your internal appeal and anything you sent with it
- A letter from your doctor that answers the denial reason
- Any new records, like test results or notes
How to send it
Use the method your final denial letter gives. The federal process takes requests online, by fax, or by mail, and HealthCare.gov lists the details.
- By mail: use certified mail with a return receipt, so you have proof of the date.
- Online or by fax: save the confirmation page or fax receipt.
- Either way: keep a copy of everything you send.
Tell the provider's billing office you've asked for an external review. Ask them to hold the bill while you wait, and note the date and the person's name.
What happens next
A standard external review is decided within 45 days after the request is received. An expedited review is decided within 72 hours or sooner, depending on how urgent your case is.
If the reviewer sides with you, your plan must accept the decision. Check your next explanation of benefits and bill to make sure the claim was paid. If you were denied care before you got it, see what to do when prior authorization is denied.
Common questions
How long do I have to ask for an external review?
You have 4 months from the date you get your plan's final denial. That's usually the decision on your internal appeal. Count from the day the notice reached you, and send your request well before the deadline. Your final denial letter or explanation of benefits should say where to send it.
Does an external review cost anything?
In the federal process run by the U.S. Department of Health and Human Services, there's no charge. If your plan uses a state process or contracts with a review organization, you may be charged. That fee can't be more than $25 per review. Your final denial letter should tell you which process applies.
Can I ask for an external review before my internal appeal is done?
In urgent situations, yes. You can file an internal appeal and an external review request at the same time. An expedited external review is decided within 72 hours or sooner, depending on how urgent your case is. Ask your doctor to explain in writing why waiting could harm your health.
What if the reviewer agrees with my plan?
Read the decision letter closely, and keep it with your other records. You may still have other options, depending on your coverage. For employer plans, the Department of Labor's Employee Benefits Security Administration can explain them. For other plans, try your state insurance department or consumer assistance program. An attorney can tell you about legal options.
Sources
- External review, HealthCare.gov. Accessed October 1, 2026.
- Internal appeals, HealthCare.gov. Accessed October 1, 2026.
- Filing a claim for your health benefits, U.S. Department of Labor, Employee Benefits Security Administration. Accessed October 1, 2026.
Related guides
- GuideInternal appeal vs. external review: which comes whenAn external review lets an outside reviewer decide your health insurance denial. Learn when you can ask, your 4-month deadline, and how the decision works.
- Start hereHow to appeal a health insurance denialA denied claim isn't the final word. Learn how to appeal an insurance denial, from internal appeal to external review, with deadlines for each plan type.
- GuidePrior authorization denied: what to do nextPrior authorization denied? Learn why it happens, how your doctor can resubmit or ask for a peer-to-peer review, and how to appeal before your deadline.
This is general information, not legal or medical advice. Rules can depend on your plan and your state. Romi Care isn't an insurer, law firm, collection agency, or government program.