How to check a medical bill for errors

Getting a medical bill can feel overwhelming, especially when you're already stressed about your health. But here's something worth knowing: medical billing errors are very common. Some studies suggest that the majority of medical bills contain at least one mistake. That means it's always worth taking a close look before you pay anything.

This guide walks you through exactly how to do that, step by step.

Start by requesting an itemized bill

Most hospitals and clinics send a summary bill. It shows a total amount but not much detail. Always ask for an itemized bill instead. This version lists every single charge, line by line.

Call the billing department and simply say, "Can you send me an itemized bill for this visit?" You have the right to ask for this. It may take a few days to arrive.

Get your Explanation of Benefits (EOB)

If you have health insurance, your insurer will send you an Explanation of Benefits after a claim is processed. This is not a bill. It shows what your insurer was charged, what they agreed to pay, and what they say you owe.

Compare your EOB to your itemized bill. The numbers should match. If they don't, that's a red flag worth investigating.

Look for these common errors

Here are mistakes that show up frequently on medical bills:

*Duplicate charges.* The same service or supply listed more than once. For example, two charges for the same blood test on the same day.

*Wrong patient information.* Your name, date of birth, or insurance ID is incorrect. This can cause claims to get processed under the wrong policy.

*Incorrect dates of service.* A charge for a date when you weren't actually at the facility.

*Upcoding.* This is when a provider bills for a more expensive service than the one you actually received. For example, being billed for a complex office visit when yours was a routine checkup.

*Unbundling.* Some services are meant to be billed together as a package at one rate. Unbundling means charging for each piece separately, which usually costs more.

*Services you didn't receive.* Always check for items on the bill that you don't remember getting. Things like extra medications, equipment, or procedures.

*Wrong diagnosis or procedure codes.* Billing uses numeric codes for diagnoses and treatments. One wrong digit can change the entire charge. You can look up codes at sites like the American Medical Association's code lookup tool.

Write down your questions

As you review the bill, write down anything confusing or suspicious. Don't try to remember it all. A simple notepad or the notes app on your phone works fine.

For each question, note the line item, the amount, and why it seems wrong to you.

Contact the billing department

Call the billing department with your list. Stay calm and polite. Most billing staff deal with questions every day and can often explain or correct errors quickly.

Ask them to explain any charge you don't understand. If they find an error, ask for a corrected bill in writing before you make any payment.

If you're not getting helpful answers, ask to speak with a billing supervisor or a patient advocate. Most hospitals have a patient advocate on staff whose job is to help you.

Don't pay while you're still disputing

You generally don't have to pay a disputed charge while you're actively working to resolve it. Let the billing department know you're disputing a specific charge and ask them to note that in your account.

Get the name of whoever you speak with and keep notes on each call, including the date and time.

Ask about financial assistance

If the bill still feels unmanageable after corrections, ask about financial assistance programs. Many hospitals are required to offer charity care or sliding-scale payment plans. You don't have to handle this alone.

Checking your bill carefully takes a little time, but it can save you a lot of money. Errors are common, and you have every right to ask questions before you pay.