Up to 80% of medical bills contain errors. You shouldn't have to figure it out alone. Our
tools check your bills for mistakes and help you fight back — starting at $49.
How It Works
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Upload your bill
Take a photo or upload a PDF. We handle the rest.
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We find the errors
Our AI reviews every line, checks for overcharges, duplicate charges, and billing code
mistakes.
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You save money
Get a clear report showing exactly what's wrong and what to do about it.
Choose What's Right for You
One-Time Bill Review
BillCheck
For you if: You have a bill right now that doesn't look right.
A professional AI-powered review of your medical bill with a plain-language report
showing errors, overcharges, and what to dispute.
Basic Review
$49
Quick review of one bill. Get a summary of potential errors and savings.
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Your files are encrypted and automatically deleted after 7 days. We never share your
medical information.
Ongoing Bill Management
Themis
For you if: You deal with medical bills regularly and need ongoing help.
Your own dashboard to upload bills, track what you owe vs. what insurance should cover,
spot errors across multiple bills, and generate dispute letters anytime.
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Cancel anytime. No contracts. Your medical data is encrypted and private.
Why Trust Us?
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Built by Lonia AI — a company that puts accessibility, security, and compliance first
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WCAG 2.2 AA accessible — our tools work for everyone, including people with disabilities
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HIPAA-aware security — encrypted files, automatic deletion, zero password storage
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Flat pricing, no surprises — we charge a fair price, not a percentage of your savings
Common Questions
How does BillCheck find errors in my bill?
BillCheck uses AI to review every line of your medical bill. It checks for common errors like duplicate charges, incorrect billing codes, services you didn't receive, and overcharges compared to standard rates. You get a plain-language report explaining what we found.
Is my medical information safe?
Yes. Your files are encrypted during upload and storage. We automatically delete them after 7 days. We never share your medical information with anyone. Our systems are built with HIPAA-aware security practices.
What's the difference between BillCheck and Themis?
BillCheck is a one-time bill review — upload a bill, get a report. Themis is a monthly subscription that gives you an ongoing dashboard to upload multiple bills, track what you owe, spot errors over time, and generate dispute letters whenever you need them.
Do I need to understand medical billing?
Not at all. We translate everything into plain English. You'll get clear explanations of what each charge means, whether it looks correct, and exactly what to say if you need to dispute something.
What if my bill doesn't have errors?
Then you'll have peace of mind knowing your bill is accurate. You'll also have documentation showing the bill was reviewed, which can be useful for your records.
