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Medical bills and EOBs: check before you pay

Don't pay a medical bill the day it shows up. Wait for your insurer's explanation of benefits (EOB), match it to the bill, ask for an itemized bill, and push back on errors and surprise out-of-network charges. Then ask about financial assistance.

Moderate30 min per billFreeChecked October 3, 2026

You'll need

  • The bill
  • The EOB from your insurer (paper or in the app)
  • Your insurance card
  • A notebook or notes app to log every call

What to know

  1. Know what an EOB is. It's a summary from your health plan of the total charges and how much you and the plan will pay. It is not a bill. Source: CMS1
  2. Wait for the EOB before you pay. Then match it to the bill. The information on the EOB should match the hospital bill, and if it doesn't, call your insurance company. Source: MedlinePlus2
  3. Ask for an itemized bill, with every charge listed separately. Source: MedlinePlus2 Check that the bill is yours, with your correct name, insurance information and address, and that you actually got each item on it. Source: CFPB3
  4. Look for the common mistakes: a charge listed twice, a service you didn't get, or the wrong number of days or doses. If you find one, ask the billing department to fix it. Source: MedlinePlus2
  5. Spot a surprise bill. For most people with private insurance, the No Surprises Act limits out-of-network bills for most emergency care, for some out-of-network providers at in-network hospitals and surgery centers, and for air ambulances. Source: CMS4 Questions go to the No Surprises Help Desk at 1-800-985-3059. Source: CMS4
  6. Claim denied? Appeal it. You must file an internal appeal within 180 days of the denial notice. If the plan still says no, you can ask for an independent external review within 4 months. Source: HealthCare.gov5
  7. Can't afford a correct bill? Ask the provider about financial assistance before you sign up for any payment plan or medical credit card. Source: CFPB7 Nonprofit hospitals are required by law to offer financial assistance programs, Source: CFPB3 and must post the policy and application on their website. Source: IRS9
Watch out Medical credit cards with "no interest" can be a trap. If you pay late or there's a balance when the promotion ends, you may owe significant interest and fees, sometimes over 25%. Source: CFPB7

Reading an EOB, line by line

Line on the EOBWhat it means
Amount billed (charges)What the provider asked for
Allowed amountThe most your plan will pay for that service. A network provider agrees to it.
Plan paidWhat insurance paid
Deductible, copay, coinsuranceYour share, by type
You may oweWhat the provider can bill you. This number should match the bill.
Remark or denial codesWhy something wasn't paid. Look them up on the back of the EOB or call the number on your card.

Terms from HealthCare.gov's glossary. Source: HealthCare.gov and CMS Source: CMS1

Calling the billing office

Hi, I'm calling about a bill for [patient name], date of service [date], account number [number]. Before I pay, can you send me an itemized bill? I'd also like to know whether this has gone through my insurance, and whether you have a financial assistance program. Can you email or mail me the application?

An email you can copy

Subject: Itemized bill and financial assistance, account [number]

Hello,

I received a bill for $[amount] for care on [date]. Please send an itemized bill listing each charge. My explanation of benefits from [insurer] shows I owe $[amount], so please also confirm the claim was billed to my insurance.

Please send your financial assistance policy and application too. I'd like to apply before setting up any payment plan.

Thank you,
[name] · [date of birth] · [phone]

A text to keep yourself honest

Reminder: don't pay the [provider] bill until the EOB comes. Then match the "you may owe" line to the bill.

See it done

Full title on YouTube: “No More Surprise Medical Bills: 5 Things To Know about the No Surprises Act Taking Effect in 2022”2022 · Checked October 3, 2026

From HHS in January 2022, when the law took effect. It covers surprise bills and estimates for self-pay patients. For reading an EOB, use the table in this lesson.

Video won't load at school or work? No problem. Everything you need is in the steps; the video's just a bonus. Watch it on YouTube later.

If it doesn't work

  • A debt collector calls about a bill you think is wrong? Ask them to verify the debt in writing. You have that right. Source: CFPB3 See Debt collectors: your rights.
  • Worried about your credit? Unpaid medical debt that's more than 365 days past due and over $500 could appear on your credit reports, so check them. Source: CFPB8 See Reading your credit report.
  • Paid without insurance and the bill is way over the estimate? If it's at least $400 more than your good faith estimate, you may be able to dispute it. Source: CMS10

Good to know

The details, if you want them. Tap a line to open it.

Hospitals have counselors

Many hospitals have financial counselors who can explain a charge you don't understand. Source: MedlinePlus2 Ask for one by name when you call.

Collectors and the No Surprises Act

If a collector tries to collect more than the No Surprises Act allows for out-of-network emergency care, dispute the debt in writing as soon as possible. Source: CFPB

Take it with you

Printable cardDownload card (PDF)

Sources

  1. Centers for Medicare & Medicaid Services Health insurance terms you should know
  2. MedlinePlus Understanding your hospital bill
  3. Consumer Financial Protection Bureau Know your rights and protections when it comes to medical bills and collections
  4. Centers for Medicare & Medicaid Services No Surprises Act key protections (PDF)
  5. HealthCare.gov Internal appeals
  6. HealthCare.gov External review
  7. Consumer Financial Protection Bureau Medical credit cards and payment plans
  8. Consumer Financial Protection Bureau Do medical bills affect my credit?
  9. Internal Revenue Service Financial assistance policies (FAPs)
  10. Centers for Medicare & Medicaid Services Medical bill rights

Lesson B5.2 · Last checked October 3, 2026 against the sources listed.

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