Insurance Appeal Letter for a Denied Claim — Annotated Example
When an insurer denies a claim, you generally have the right to appeal — and appeals succeed more often than patients expect. This letter challenges the denial on its stated grounds and formally requests reconsideration.
Your real packet includes a letter like this one anda matching phone script — so you're ready whether you write or call.
Sample scenario
- Provider
- Summit Health Plan (insurer)
- Bill
- $3,150 (ER claim denied as "not medically necessary")
- Situation
- The patient went to the emergency room with severe symptoms; the insurer later denied the claim as not medically necessary. The patient wants to appeal and request reconsideration.
Recommended approach
- File a written appeal citing the specific denial reason (this letter).
- Attach any supporting documentation you can obtain, such as physician notes.
- If the internal appeal is unsuccessful, ask your plan about your right to an independent external review.
What it can help with
- Reconsideration and possible reversal of the denial
- Coverage applied and your out-of-pocket balance reduced
- A documented record if you escalate to external review
The letter you'd mail or email to the billing office
[Date] Summit Health Plan Attn: Appeals Department [Insurer Address] Re: Appeal of Denied Claim Member Name: [Your Name] Member ID: [Your Member ID] Claim/Reference Number: [Claim Number] Date(s) of Service: [Service Date] To Whom It May Concern: I am writing to formally appeal the denial of the claim referenced above, which was denied on the basis that the care was "not medically necessary." I respectfully disagree with this determination and am requesting a full reconsideration. I sought emergency care because of [brief description of symptoms], which a reasonable person would have believed required prompt medical evaluation. I would ask that the claim be reviewed in light of the circumstances at the time care was sought, rather than with the benefit of hindsight, and I am happy to provide supporting documentation from my treating provider on request. If appropriate, I also request a peer-to-peer review with the reviewing physician. I understand that I may have the right to appeal this decision under my plan and applicable law, and that an independent external review may be available if this internal appeal is not resolved in my favor. I would appreciate written confirmation of the outcome of this appeal and, if it is denied, instructions for requesting an external review. Thank you for your prompt attention to this matter. Sincerely, [Your Name] [Your Contact Information]
Why this letter works
What each part is doing and why it matters.
The identifiers
Member ID and the claim/reference number route the appeal to the right file — appeals without them stall.
Disputing the stated reason
The letter answers the actual denial reason (medical necessity) head-on rather than arguing in general — appeals are decided on the specific grounds cited.
The "prudent layperson" framing
Asking that emergency care be judged by what a reasonable person believed at the time reflects a widely recognized standard, stated without overclaiming what the law guarantees.
Preserving external review
Noting that an independent external review "may be available" keeps your escalation path open while staying accurate about your rights.
What to say if you call instead
Your packet includes a full phone script. Here's a preview of the key pieces.
Call goal
Ask why the claim was denied and find out how to file a formal appeal.
Opening
“Hi, my name is [Your Name]. I'm calling about a claim that was recently denied. I'd like to understand the reason and ask about the appeal process.”
Your ask
“Can you tell me the specific reason the claim was denied and explain how to file a formal appeal?”
If they say…
They say:
"The denial is final."
You can say:
"I understand, but I'd like to request appeal instructions in writing. Can you tell me where to send that request?"
The full script in your packet also includes a call preparation checklist, a documentation form to fill in during the call, and a follow-up email template.
Good for
- A claim denied as not medically necessary
- Prior-authorization disputes
- Coverage or eligibility denials
- Partial payments you believe are too low
Not the right fit
- There's no insurer involved (self-pay) — use Hardship, Settlement, or Itemized
- The problem is a billing error, not a coverage decision — use a Billing Error Dispute
- An unexpected out-of-network charge — use a Surprise-Bill Dispute
This example uses entirely fictional names, providers, and figures. It is not legal, medical, or financial advice — hospital and insurer policies vary. Whether any particular law or program applies depends on your specific situation. Your packet will use the details from your own bill. Review everything before sending, and talk to a professional for complex situations.
Other letter types
Get this for your actual bill
Upload your bill and we'll create a personalized version of this letter and phone script — with your charges, dates, and situation — ready in a few minutes.
Get my Action Packet — $19Letter + phone script + call guide. One-time payment.