Medical bill guides
When a medical bill arrives, it’s normal to have questions. These guides answer the common ones, with links to the official rules.
Money you may get back or may not owe
What to ask when you may have paid too much.
- Paid more than you owed on a medical bill? How to ask for the money back
How a credit balance happens, how to spot it, and how to ask for the money back in writing.
Updated November 7, 2026
- Hospital charity care requirements and how to apply
Also called hospital financial assistance: who decides, the state rules from official sources with the federal poverty figures they use, and how to apply.
Updated November 7, 2026
- Financial assistance denied? How to appeal or reapply
What to do after a hospital turns down your financial assistance application: read the letter, fix what is missing, find the appeal deadline, and ask the right questions.
Updated November 7, 2026
- Paid a hospital bill, then qualified for financial assistance?
What hospital financial assistance is, how the rules treat money you already paid, and how to apply and ask for a refund.
Updated November 7, 2026
- The No Surprises Act explained
A federal law, in force since 2022, that limits what out-of-network providers you did not choose may bill people with most private health plans, and gives uninsured patients a dispute route.
Updated October 23, 2026
- Bill higher than your good faith estimate? What you can do
For uninsured and self-pay patients: when a bill is at least $400 above the good faith estimate, the federal dispute process, its deadline and fee, and what to ask first.
Updated November 8, 2026
- How to lower a hospital bill, or what to do if you can’t pay
The order to ask in when a hospital bill is more than you can pay: the itemized bill, financial assistance, a payment plan, collections timing and the questions for the call.
Updated November 7, 2026
- A bill from a doctor you did not choose
Why a doctor you never picked can send a bill, and what the No Surprises Act says about it.
Updated November 7, 2026
- How long does a provider have to refund a patient overpayment?
The patient refund rules we checked in state and federal law, who each one covers, and when the clock starts.
Updated October 30, 2026
- Can a hospital charge interest or late fees on a medical bill?
Whether a hospital can add interest or late fees to a medical bill, the state rules we read in the statutes, and the questions to ask about your own bill.
Updated November 8, 2026
- Reached your out-of-pocket maximum but still getting bills?
What the yearly limit covers, what it leaves out, and what to ask when bills keep coming.
Updated October 29, 2026
- Observation status vs inpatient admission: why it changes your hospital bill
Why the same nights in a hospital bed can cost more under observation, and what to ask.
Updated October 11, 2026
When the bill arrives
Understand what you’re looking at.
- How to read a medical bill
A line-by-line walkthrough: what each amount means, and which numbers should agree.
Updated October 24, 2026
- Medical billing codes explained (CPT, HCPCS, revenue codes)
What the numbers and letters on a bill mean, and which ones describe the service.
Updated October 30, 2026
- Medical bill months later: is it normal, and what should you ask?
Why a medical bill can arrive months after care, the three clocks people mix up, the rules we read in primary texts, and what to ask about a late bill.
Updated November 7, 2026
- Why is my hospital bill so high?
Why hospital bills reach surprising amounts, and what to ask before paying.
Updated October 23, 2026
- A bill from a lab you never visited? Why, and what to ask
Why a lab you never visited can send a bill, when the No Surprises Act may limit it, and what to ask the lab and your insurer.
Updated November 8, 2026
Before you pay
Check it, and gather what you need.
- Medical bill checklist: what to check before you pay
Ten things to check on any US medical bill, from dates and totals to your EOB.
Updated October 24, 2026
- Can I check a medical bill without uploading it?
Yes. A checker can read your bill in your browser instead of taking the file. Here is what such a tool may still send, and how to tell which kind a tool is.
Updated October 29, 2026
- What is an itemized medical bill, and how to get one
Why it’s the first thing to ask for, what it should contain, and a free letter you can send.
Updated October 28, 2026
- What is a facility fee on a medical bill, and what should you ask?
A facility fee is the hospital's own charge, billed apart from the doctor's fee. What it may be called, why one visit gives two bills, two state rules we read, and what to ask.
Updated November 8, 2026
- Asked to pay before surgery? What to check first
What the emergency rule says, which estimate you can ask for before planned care, and what to ask before paying a deposit.
Updated November 8, 2026
If something looks wrong
Ask about it calmly, one line at a time.
- Medical bill mistakes and errors: common kinds and how to check your bill
Eight common kinds of medical bill mistakes and errors, how to check your own bill for them, and the question to ask about each.
Updated November 7, 2026
- How common are medical billing mistakes? What the research says
What surveys and audits measured about mistakes on medical bills, and why no one knows the share of bills with an error.
Updated November 7, 2026
- Duplicate charges on a medical bill
How to tell a real repeat from two separate services, and ask without accusing anyone.
Updated October 24, 2026
- Emergency room visit levels 1 to 5: how ER bills work
ER visits are billed at one of five levels, 1 the simplest and 5 the most complex, by the hospital and by the doctor separately, and the level is one of the main things that sets the size of the bill.
Updated November 7, 2026
- Got an ambulance bill? What the law covers and what to ask
Air and ground ambulance bills follow different rules. What the federal pages say, one state law we read, what Medicare says, and what to ask.
Updated November 8, 2026
- How to question, dispute or contest a medical bill
A step-by-step way to get a charge explained or changed, with a free dispute letter to send.
Updated October 30, 2026
- What to do if the billing office says no
What to ask after a no, a script for the next call, and the usual next official step for your situation, with its deadline rule and where to go.
Updated October 22, 2026
- Sent to collections while insurance is still processing? What to ask
What federal rules say about collections while a claim is open, the separate credit report policies, four things to ask the billing office, and what to do if a collector calls.
Updated November 7, 2026
- Charged for your annual physical? Why, and what to ask
What most plans must cover at no cost, the ways a free checkup can still end up with a charge, and what to ask the billing office and your plan.
Updated November 8, 2026
Insurance and EOBs
Match the bill with what your insurer says.
- Medical bill vs EOB: how to compare them
An EOB (Explanation of Benefits) is the statement your insurer sends after a claim: what it allowed, what it paid and what you may owe. It is not a bill.
Updated November 8, 2026
- Paid a medical bill yourself? How to get your insurer to pay you back
How to send your own claim after you paid: what to attach, the deadlines, and what to do if the plan pays less.
Updated October 30, 2026
Visitors, students and expats
A US bill, wherever you live now.
- US medical bill as a visitor, international student or expat: what to check
Got a US hospital bill after a trip, a semester or a move? What to check from anywhere.
Updated October 23, 2026
Free tools
No account. Nothing you type leaves your device.
- Itemized bill request letter
A letter asking the provider for every charge, line by line.
- Refund request letter
A letter asking for a credit balance back when you paid more than your share.
- Financial assistance request letter
A letter asking a hospital for its financial assistance policy and application form.
- Charity care check
A check of whether you may qualify for a hospital’s financial assistance, run on your device.
- Letter to a collection agency
A letter disputing a medical debt, or asking the agency for verification.
- Medical bill dispute letter
A letter asking the billing office about the charges you type.
- Insurance claim file request letter
A letter asking a health plan for the documents behind a decision on a claim.
- Medical bill code lookup
Medicare’s name for a drug, supply or equipment code on your bill.
- Health money dates 2027
Open enrollment, FSA, Medicare and tax dates for 2027, each with its source.
- Medical bill glossary
The words and abbreviations on bills and EOBs, explained.
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