How to dispute a hospital bill

First, get the itemized bill

The bill most people get at discharge is a summary — it shows department totals like “Pharmacy” or “Laboratory” and nothing line by line. You cannot dispute what you cannot see, so step one is always the itemized statement, the one with a billing code, a quantity, and a price on every line.

Under your HIPAA right of access (45 CFR §164.524), you can request it, and the hospital generally must respond within 30 days. Our free itemized-bill request letter writes that request for you in about two minutes.

Step 1 — Compare each charge to the benchmarks

With the itemized bill in hand, you can check each line against public pricing data. The patterns worth looking for are well-documented in billing research:

• Duplicate charges. The same test, supply, or medicine billed twice — sometimes under a slightly different name.
• Upcoding. Being billed for a more complex, costlier version of a service than the care you actually received. An emergency visit coded at the highest level (a code like 99285) when the documented visit was routine is the classic example.
• Unbundling. Splitting one package of care into several separately-priced lines to raise the total — for example, billing a metabolic panel and also each of its component tests.
• Prices far above the public benchmark. Drugs, supplies, and room charges priced well above what Medicare pays or what the hospital lists in its own price-transparency file.

The benchmarks are free to look up: the CMS Physician Fee Schedule (what Medicare pays per code), NADAC (federal drug-acquisition cost), and each hospital’s Hospital Price Transparency file. Our methodology page shows exactly how to compare a line against each one.

Step 2 — Write a specific letter

A specific letter is harder to set aside than a vague complaint. A strong dispute letter names, for each charge you question:

• the exact billing code and the amount charged,
• the public benchmark you are comparing it to, and
• the federal rule that applies — HIPAA §164.524 for records, the No Surprises Act for surprise out-of-network charges, FDCPA §1692g if a collector is involved, or ACA §501(r) for charity care at a non-profit.

Keep the tone factual and calm. You are asking the billing office to review specific lines against public data — not accusing anyone. State what you found, cite the benchmark, and ask for a written response.

Step 3 — Send it certified, then follow up

Mail the letter certified, return receipt requested. It costs a few dollars and proves the date the hospital received it. Many of the statutes you cite put a 30-day clock on a written response, and the receipt is your record of when that clock started.

If you do not hear back, the next step is to escalate. The offices that handle these complaints include your state Attorney General’s Office of Consumer Protection, the Centers for Medicare & Medicaid Services (CMS), the IRS for non-profit hospital §501(r) compliance, and the Better Business Bureau. Naming them in a follow-up — calmly — tends to move a bill out of front-line billing and into compliance review.

Three honest ways to do it

Disputing a bill is real work, and different situations call for different help:

• Do it yourself, free. Everything above is public. If you have the time and patience for the spreadsheets, you can do all of it at no cost.
• Use a tool to do the comparison for you. If you would rather not learn the data formats, our audit checks every line against six federal data sources and drafts the dispute letters with the codes, the math, and the statutes already inside, for $19.97.
• Hire a credentialed advocate or attorney. For a bill in active litigation, a denied appeal, or a genuinely complex case, a medical billing advocate or healthcare attorney is the right call.

Common questions