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Your appeal letter.
Free to generate.

Upload your denial letter or describe what happened. Get a formal, state-specific appeal letter in seconds — citing statutes and deadlines.

78% of administrative denials are overturned on appeal
50+ states supported with specific statutes
0Upfront cost
78%Appeal success rate
30sTo generate a letter
$249Only if you win
Step 1 of 3 · Auto-saved as you type

We'll send reminders at 30 and 45 days. No spam, unsubscribe anytime.

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Click to upload or drag and drop your denial letter

JPEG, PNG, PDF — max 20MB

⚠ Your previous file couldn't be restored for privacy. Re-upload to include it in this letter.

Include: claim number, denial reason, date of denial, provider name, and amounts if known. The more detail, the stronger the letter.

Review your submission

State:—
Provider:—
Email:—
Document:—
Denial details:
—

Common questions

How does the $249 success fee work?
Your appeal letter is completely free to generate. If your appeal wins — meaning your insurance company reverses the denial or approves the previously denied claim — ClaimSage charges a $249 flat success fee. If your appeal does not win, you owe nothing. The fee is not a percentage of your recovery — it's a flat service fee.
Is this considered legal advice?
No. ClaimSage generates a formatted letter based on the information you provide, citing publicly available statutes and regulatory bodies. It is not legal advice, and ClaimSage is not a law firm. For complex denials or large claim amounts, you may want to consult an attorney. The letter can serve as a starting point regardless.
What if I don't know my denial code?
You don't need it. Describe what happened in plain English in the text field above — the denial reason, what you believe was wrong, and any documentation you have. The letter will address the claim based on what you provide. If you have an EOB or denial letter, uploading it gives the AI more to work with.
What happens after I generate the letter?
You'll receive a complete, ready-to-send appeal letter with your state-specific citations and deadlines. We'll email you a reminder at 30 and 45 days to check on your appeal status. At 45 days, we'll ask if your appeal won — if it did, that's when the $249 success fee applies.
Can I edit the letter before sending?
Yes. The letter is yours. You can copy it, download it, and edit any of the content before submitting it to your insurer. We recommend filling in your personal details and having your doctor review it before sending.
Where can I find a lawyer if I want legal counsel?
ClaimSage isn't a law firm and doesn't recommend a specific attorney. If you'd like to consult one, your state's official bar Lawyer Referral Service (LRS) is the public, bar-run starting point — see our referral shortlist for NY, CA, and MA residents →. For residents of other states, the ABA directory indexes every state's LRS.
Reading your submission
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Finalizing

Usually takes 15–25 seconds

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This letter is free today. Here's what happens next.

If your appeal wins, ClaimSage charges a $249 flat success fee — only if you win. The fee is not a percentage of what you recover.

See how this compares to an attorney →
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Your appeal letter is ready

Generated in a few seconds

    See a $14,200 case study → Or upload your EOB to extract claim details
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    Your Appeal Letter

    What to do with this letter

    1. 1
      Fill in your details — Add your name, address, and the date at the top and bottom of the letter.
    2. 2
      Add your insurer details — Fill in the insurer name and address (you can find this on your EOB or denial letter).
    3. 3
      Attach supporting documents — Include your EOB, denial letter, and any documentation supporting your appeal (doctor's notes, prior authorization records).
    4. 4
      Send by certified mail — Mail via USPS Certified Mail with Return Receipt. Keep a copy for your records.
    5. 5
      Track your appeal — Insurers typically respond within 30 days. We'll email you a reminder at 30 and 45 days.

    Need a lawyer? State bar lawyer-referral services are free. This is just a referral — not legal advice. ClaimSage isn't a law firm. Each state's bar runs a free Lawyer Referral Service that pre-screens attorneys and sets the consultation fee.

    Find a NY / CA / MA referral →