Fight unfair medical bills in minutes with AI.
Upload your US hospital, clinic, or ER bill, click the charges you disagree with, and get a ready-to-send researched AI dispute letter to challenge those costs on your own terms.
No legal knowledge needed. Works on most US medical bills.
Patients have used BillFix to challenge ER bills, surgery charges, surprise out-of-network fees, and more.
$935M+
In disputed charges identified by patients who fought back
80%
Of people who dispute get a lower bill (KFF)
1 in 3
Medical bills contain errors you are paying for (NerdWallet)
How BillFix gets money back in your pocket
We help you turn confusing bills into clear disputes that billing departments have to take seriously.
Catch obvious mistakes
Spot duplicate charges, services you never received, or basic math errors by walking through your bill step by step.
Challenge overcharging
Flag overpriced items and unexplained fees. Your letter explains why those charges are unreasonable and asks for specific corrections.
Fix coding and insurance issues
Highlight suspect CPT codes, out-of-network surprises, and denied insurance portions so you can push for re-processing at the correct rate.
Request itemized bills and documentation
If your bill is a single lump sum, generate a letter requesting a detailed, itemized bill and supporting records.
Negotiate payment plans from strength
Use your letter to ask for reductions and fair payment plans, armed with a clear record of the errors you have found.
Stay out of collections
Act early with a professional dispute letter, so you are not scrambling once a bill hits collections.
From overcharged to fighting back
in under 5 minutes
No legal jargon. No expensive advocates. Just upload your bill, flag the issues, and we will handle the letter.
Upload your bill
Snap a photo or upload a PDF of your US medical bill. BillFix automatically detects the key details like provider, dates of service, and totals.
Click the charges you want to dispute
Scroll through your bill on-screen and click the line items that look wrong. Add a short note if you know why they are wrong, or just say "I don't recognize this."
Download your dispute letter
We generate a customized, provider-ready letter that lists every flagged charge, includes your details, and uses clear, assertive language you can send by mail, portal, or email.
You stay in control. BillFix never contacts your provider. You decide when and how to send your letter.
Pricing
Less than a coffee, can save you hundreds or thousands.
Try BillFix on your next bill. If you don't see value in the letter we create, you don't have to use it.
No subscription traps. Cancel anytime in a few clicks.
Basic
$1.19/mo
Billed yearly
Best for one-off bills
- Generate up to 2 dispute letters per month
- Upload 1 bill, flag unlimited line items
- Download as PDF and copy-paste text
- All letter types included
- Email support
- Cancel anytime
Standard
$13.99/mo
Billed yearly
Most popular for families
- Generate up to 10 dispute letters per month
- Upload multiple bills (ER, clinic, specialist)
- Save and edit letters anytime
- All letter types included
- Priority email support
- Cancel anytime
Pro
$21.99/mo
Billed yearly
For heavy users and advocates
- Generate up to 50 letters per month
- Manage multiple patients or family members
- Advanced letter customization options
- All letter types included
- Priority support and faster updates
- Cancel anytime
DISCLAIMER: BillFix is an educational tool that generates template letters based on publicly available consumer rights information. This is NOT legal advice. BillFix is not a law firm and does not provide legal representation. Generated letters are templates that should be reviewed before sending. Results are not guaranteed. Consult a licensed attorney for legal advice specific to your situation.
Real Results
Real people are saving real money
See how BillFix users flagged charges, sent letters, and got their bills reduced.
“Went to the ER for a broken wrist at St. David's in Austin. Got a $4,200 bill. I uploaded it to BillFix and it flagged 3 errors — they charged me twice for the X-ray and billed a "facility fee" I shouldn't have gotten. Sent the dispute letter, and 3 weeks later my bill dropped to $980.”
Sarah M.
Austin, TX
“I had a gallbladder removal at Grady Memorial. Uninsured, single mom, making $38k. The bill was $12,000. I had no idea hospitals had charity care programs. BillFix walked me through it and generated the application letter. Two weeks later I got a letter back — entire balance forgiven. I cried.”
Danielle R.
Atlanta, GA
“Blue Cross denied my MRI for a herniated disc, said it wasn't "medically necessary." My doctor was furious. I used BillFix to generate an insurance appeal letter that cited the ACA and my doctor's referral. They reversed the denial in 11 days. Would've been $1,800 out of pocket.”
James T.
Naperville, IL
“Got a $6,500 bill after having my son at Texas Health Presbyterian. When I requested the itemized bill through BillFix, I found they charged $43 for "skin-to-skin contact" — holding my own baby. Plus $800 in duplicate charges. Sent the letter and got it reduced to $2,100.”
Priya K.
Dallas, TX
“I'm a freelance photographer, no insurance. Had chest pains, went to the ER at Mount Sinai. Turned out to be anxiety. Bill was $8,700 for basically blood work and an EKG. BillFix helped me file a hardship letter and apply for their financial assistance program. They reduced it to $870 — 90% off.”
Marcus L.
New York, NY
“My daughter broke her collarbone at soccer practice. The orthopedic clinic billed us $3,200 and our insurance only covered $900. I used BillFix to dispute the remaining $2,300 — turns out they upcoded the visit from a Level 3 to a Level 5. After the dispute letter, we owed $400.”
Tom & Linda W.
Phoenix, AZ
FAQ
Got questions? We've got answers.
DISCLAIMER: BillFix is an educational tool that generates template letters based on publicly available consumer rights information. This is NOT legal advice. BillFix is not a law firm and does not provide legal representation. Generated letters are templates that should be reviewed before sending. Results are not guaranteed. Consult a licensed attorney for legal advice specific to your situation.