About BillMender
BillMender started from a personal, frustrating experience with hospital billing — a coordination-of-benefits failure and an overbilled charge that took real effort to track down and dispute. Most people don't have the time, the billing-code fluency, or the patience to do that themselves. BillMender exists to shortcut that work.
Built by a software engineer
Not a healthcare company or a law firm — one person applying rules-based software to a genuinely frustrating problem. That's worth knowing as you weigh how much to trust what this tool tells you.
Rules, not AI guesswork
Every finding comes from a deterministic rule — the same input always produces the same output. Each one cites a specific federal rule or CMS coding edit, listed in the guides. No language model decides what's wrong with your bill.
Public data, no invented numbers
Price benchmarks come from CMS reference pricing. We never invent a billing code, a date, or a dollar amount — every figure in your letter traces back to something you typed in.
What this isn't
BillMender is not a law firm, does not employ attorneys, and doesn't review your specific legal situation. It's a document-preparation and education tool: it flags patterns that are commonly errors, cites the rule behind each one, and drafts a letter for you to review and send yourself. For anything beyond that — a denied appeal, a collections threat, a genuinely complex dispute — talk to a licensed attorney or a professional billing advocate.
What this is — and isn't
- BillMender is a document-preparation and education tool. It is not a law firm and does not provide legal advice.
- Findings and estimated overcharges are generated from the information you enter and public reference pricing — not a guarantee of any refund, reduction, or outcome.
- We never invent billing codes. Every figure is derived only from what you entered.
- Letters are for you to review, sign, and send yourself. Results vary by hospital and insurer.