See what looks wrong. Fight it — or ask them to forgive the bill. You keep every dollar.
Drop the bill — photo or PDFwe review every line · what looks wrong, what’s missing, what’s worth asking aboutCheck my bill, free →Brand new, so we'll show you the thing that actually convinces: the product doing its job. Hit analyze and watch it flag what looks wrong on a sample bill.
Flagged by analysis — not a recovered-dollar result. That's the honest claim, and it's enough.
Check my bill, free →We read what's on the bill, flag what doesn't add up, and write the letter that makes them show their work. Here's exactly what fires an upcoding flag:
A level-5 ER code claims life-threatening complexity — but the bill shows one blood panel, no imaging, same-day discharge. The code's own receipts don't back it up. Strongest signal, and it's entirely on the paper you gave us.
ER visits are coded on a five-level scale, and level 5 is the tier reserved for the most complex, highest-acuity care. The higher the level claimed, the heavier the documentation that has to sit behind it — so a top-of-scale code on a thin bill is where we point the letter.
When your bill or EOB carries diagnosis codes, they get checked against the visit level. An ear infection billed as a life-threatening emergency is a mismatch the letter asks them to explain.
“What happened? How long were you there? Admitted or sent home?” Two intake questions turn a weak flag into a strong one.
These four are the most common — not the whole review. Every bill runs the full battery below, and every finding shows the rule or source behind the question.
If a hospital sent your bill, you may have another option. Nonprofit hospitals must have a financial-assistance policy under federal law (501(r)). If there is a balance, we prepare your written request. The hospital decides if you qualify — some reduce or forgive the balance.
No triumphant origin myth. Before BillFighter existed, its founder got a bill, didn't know the rights that applied, and paid it. This product is the letter that should have been sent — built so the next person doesn't need to already know the law to use it.
In 2021, I got a bill for my newborn son's surgery. Something about it didn't sit right — but it arrived looking official, and official things get paid.
So I paid it. Not because it was right. Because I didn't know I was allowed to ask whether it was.
Years later I learned what I didn't know then: the itemized bill I never asked for. The validation letter I never sent. The questions I never knew I could ask. The rights existed the whole time — printed in laws nobody hands you in the hallway.
BillFighter is the letter I should have written, built so you don't have to already know the law to use it. Upload the bill. We'll show you what we see and write the letter. You mail it — or, with In Your Corner, we do, certified.
Whatever you win is yours. All of it.
Snap a photo or drop a PDF — medical bill, EOB, denial, or a collection notice.
We review every line and flag what looks wrong, what’s missing, and what’s worth asking about — each one matched to the rule or right behind it.
A dispute letter, written from your bill in about a minute. Mail it yourself, or we send it certified — a paper trail on the record.
Written from the exact findings on your bill, and mailed USPS certified — by you, or by us with In Your Corner. The quality of the letter is itself the evidence — so read one.
BillFighter is not a law firm and does not give legal advice. You read the letter and decide what to send.
Re: Account #4471-B — Dispute of billing charges and request for documentation
To Whom It May Concern:
I dispute the accuracy of the charges identified below and request documentation sufficient to explain and substantiate them. I ask that you review the account and correct the following:
1. CPT 99285 appears twice on the statement, same date of service — these entries appear potentially duplicative. Please identify each, or remove the duplicate ($921.00).
2. The “Supplies — misc” line of $189.00 is not itemized; I request a full itemized…
If you dispute in writing during the validation period, a covered debt collector generally must pause collection of the disputed amount until it mails verification.
When the No Surprises Act applies, protected out-of-network services are generally limited to in-network cost sharing.
Ask for the itemized bill in writing — CPT codes, dates, every charge. Medicare requires it on request, many states go further, and the request itself starts your paper trail.
BillFighter is not a law firm and does not give legal advice. You read the letter and decide what to send.
a percentage of whatever they claw back — the bigger your win, the bigger their bill.
billed whether or not the bill is reduced — the risk stays with you.
of your winnings. Free Scan, 3 a month · Fight Kit $39 one-time per case · In Your Corner $99 founding, then $129 per case · extra letters $15 · extra certified sends $29. No subscriptions. That's everything.
Yes — disputing bills and requesting debt validation are federally protected rights under the Fair Debt Collection Practices Act (FDCPA) and various state consumer protection laws. You have the right to request an itemized bill, dispute errors, and demand debt validation.
No — a letter isn't a financial event, and nobody reports it. To be clear about what we are: BillFighter fights the bill, with the biller or the collector. We are not a credit repair service, we don't work on credit reports, and nothing we do is designed to change your score. Credit report questions go straight to the bureaus — your free reports are at AnnualCreditReport.com.
We track your case's follow-up date and your escalation letter is one tap away. On a validation demand, silence works in your favor — a collector that hasn't validated can't lawfully keep collecting.
Never. You keep 100% of everything you recover. Every price is one-time, per case: Fight Kit $39, In Your Corner $99 founding then $129, extra letters $15, extra certified sends $29. No subscriptions. That’s everything.
Medical bills, collection notices, EOBs, insurance denials, and prior authorization denials.
BillFighter reads your bill and points out possible problems. It is careful, but it is not perfect. Read every finding yourself. For a big or complicated case, talk to a consumer rights attorney.
Attorneys generally work on contingency, taking a percentage of your recovery. BillFighter never takes a percentage — you keep everything you win. For complex cases, we also connect you with consumer rights attorneys.