Free Medical Bill Tools: Surprise Bills, Disputes, Negotiation
Most medical billing disputes come down to one question answered early: was this a bill you could have avoided? Federal law protects you from a good many that you could not — and leaves one large gap that surprises almost everyone. The tools here sort out which side of that line your bill falls on, and what to send once you know.
All three run inside your browser. Your account number, dates and amounts are never saved, logged or transmitted. There is no sign-up and no email field. These tools give general information based on federal rules published by CMS and the Department of Labor as of October 2026 — not legal, medical or insurance advice — and no result decides what you owe. Several states protect patients further than federal law does; check with your state insurance regulator.
1. Was this bill even allowed?
Since January 2022 the No Surprises Act has covered three situations: emergency care wherever it happens, an out-of-network clinician treating you at an in-network hospital or surgical centre, and air ambulance transport. In all three you owe your ordinary in-network cost share and nothing more.
The gap is ground ambulance, which was left out of the Act entirely. Air ambulances are covered; the ambulance that drove you to hospital is not. That single exclusion accounts for a large share of the bills people assume must be illegal.
The checker also handles the part that causes the most confusion: the consent form. For a surgeon or specialist you chose, a provider may ask you to waive protection — but only on a separate prescribed form, given at least 72 hours in advance, with a cost estimate and an offer of an in-network alternative. For anaesthesia, radiology, pathology, neonatology, lab work, assistant surgeons, hospitalists and intensivists, consent may never be sought at all, and a signature obtained anyway does not make the bill lawful.
2. Putting the dispute in writing
Whatever the answer, the first request is always the same: the fully itemised bill with procedure codes. Summary statements hide duplicate charges, services never delivered and codes that do not match what happened, and you cannot dispute what you cannot see.
The generator words the letter differently depending on whether it is going to the provider or to a collection agency — the latter brings the Fair Debt Collection Practices Act into play, with its own verification duty.
3. Before you pick up the phone
Eight things to have in front of you. The last one is where most negotiations come undone: get anything agreed confirmed in writing before paying, because a verbal settlement nobody recorded is very hard to enforce three months later.
What none of these decide
The checker applies the federal floor to the situation you describe. It has not seen your plan documents, your bill or anything you signed, and a number of states protect patients beyond what federal law requires. A result of "not protected" means the federal Act does not reach it — not that the bill is correct, not that it cannot be negotiated, and not that you are outside your state's own rules.
Non-profit hospitals are required to maintain a financial assistance policy, and many people who qualify are never told. See how that works before agreeing to a payment plan on a bill you cannot afford.