Founded by a former hospital billing analyst who got tired of watching patients get overcharged.

BillFight's dispute letters are built by a small team with hands-on experience in healthcare revenue cycle — reading EOBs, working denials, and writing formal demand letters on behalf of patients.

That experience drives how every BillFight letter is structured: the right statute cited, the right demand phrased, and the right deadline set so the provider has to respond in writing within 30 days.

Everything BillFight generates is grounded in the same federal toolkit — No Surprises Act, FDCPA, ERISA appeal rights, ACA, and CMS billing rules — that the team has used to dispute bills in real cases.

A professional dispute letter, personalized to your bill, in 60 seconds.

You describe what happened. The system pairs your bill with the federal law that prohibits the specific error you're contesting — No Surprises Act, FDCPA, ERISA, ACA, CMS billing rules — and writes a dispute letter you can print, sign, and mail today.

• Healthcare revenue-cycle expertise, applied to dispute letters
• HIPAA-aware intake — minimal data, automatic purge on delivery
• Every letter pairs the specific error with the statute that prohibits it

BillFight is a document preparation service — not a covered entity or business associate under HIPAA — but we apply HHS Privacy Rule guidance to the data we collect. We ask only for the bill plus a short issue description: no diagnosis codes, no medical records, no signed release needed.

Every BillFight letter follows the same audited structure — provider, error, statute, demand, deadline — and pairs the specific billing error with the federal law that prohibits it: CMS billing rules, the No Surprises Act (NSA), ERISA appeal rights for insurer denials, the ACA, and the FDCPA for collection activity. Not a generic template.

Across BillFight disputes to date, written disputes produce a reduction on the patient balance ~78% of the time — with a typical overcharge band of $1,000–$5,000 identified and removed from the bill. Median time to first response from the provider: 30–60 days.

BillFight prepares dispute documents based on the facts you submit — we do not represent you in court, we do not give legal advice, and we do not contact your provider on your behalf. The letter is generated for you to review, print, sign, and mail yourself.

Four steps from bill to resolution.

Every BillFight letter is generated from the same audited structure — provider, error, statute, demand, deadline. The statute is matched to the specific error on your bill, not dropped from a generic template.

• 1.You describe your bill in 2 minutes.
• 2.The system pairs the error with the correct federal statute.
• 3.You receive a personalized letter — print, sign, mail.
• 4.Provider responds within 30 days; reduction is typical.

• See the full process →
• View pricing tiers →
• Read anonymized outcomes →
• Read FAQs →
• How-to dispute guide →