What this checks
- Duplicate charges: the same code, date and amount more than once, and the same code on the same day with different amounts.
- Too many units: more units of a code on one day than Medicare's Medically Unlikely Edits (MUEs) allow.
- Prices: each charge compared with Medicare's national rate for the same code, for example "about 6.2 times the Medicare rate".
- Room days: more room and board days than nights in the hospital.
- Your insurance: a bill that asks for more than your Explanation of Benefits (EOB) says you owe, charges that are missing from the EOB, and denied claims.
- Good Faith Estimate: for uninsured and self-pay patients, a bill that is $400 or more above the provider's estimate.
- Unclear charges: large "miscellaneous" or "supplies" lines, and charges without a procedure code.
Every result explains why it may be worth asking about. A result is a reason to ask, not proof that a charge is a mistake.
Your bill stays on your device
Your bill is read and checked by this page, in your browser. Nothing is uploaded or saved, there are no accounts, no analytics and no cookies, and the page loads nothing from other websites.
The page's security policy (Content-Security-Policy) blocks all network requests, so it could not send your bill anywhere even if it tried. PDFs are read by PDF.js in a worker script from this site, which gets the file directly and has nothing to download.
How to check this yourself
- Open your browser's developer tools (F12), go to the Network tab, then add your bill: no requests to other sites appear.
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View the page source and find the Content-Security-Policy tag with
connect-src 'none'. - The source code is public.
What this cannot do
- It is for bills from the United States.
- Scanned or photographed bills cannot be read yet. You can type the charges in instead.
- The checks are hints. Insurers have their own rules and contracts, and Medicare limits and rates are only a reference.
- It does not check whether codes belong together (bundling), whether care was medically necessary, or your insurance benefits.