What It Means
An explanation of benefitsBenefits packageEverything an employer offers on top of wages, such as health insurance, paid leave and a retirement plan, which can be worth thousands of dollars a year. See more (EOB) is a statement your health planHealth insuranceA plan you pay a premium for that covers part of your medical costs, while you pay your own share through a deductible, copays and coinsurance. See more sends after you get care, showing how the cost was shared between you and the plan. CMS's guide stresses that it is not a bill. It lists the amount the provider billed, the allowed amount the plan and provider agreed on, what the plan paid, and what you may still owe.
Try It: Check a Medical Bill Against Its EOB
Copy four numbers from the EOB and one from the provider's bill. The starting numbers are an example.
The bill matches what the EOB says you owe.
The bill asks for more than the EOB shows. Call the provider and your plan before you pay.
The bill asks for less than the EOB shows. Check that both cover the same visit and date.
How People Say It
- "Don't pay anything until the EOB comes."
- "The EOB says we owe $50, but the bill says $180."
- "Why does it say 'This is not a bill' in giant letters?"
The Breakdown
What the rule says. After your plan processes a claim, it explains how it handled the cost in an EOB. CMS's guide calls it the insurer's explanation of how a visit's costs were shared, and says plainly that it is not a bill. Any bill comes separately, from the doctor's office or hospital.
The lines that matter
| EOB line | What it means |
|---|---|
| Amount billed | What the provider charged for the visit |
| Allowed amount | What the plan and provider agreed the care is worth |
| Plan paid | What your health plan pays the provider |
| You may owe | What's left for you, such as a deductibleInsurance deductibleThe part of a covered loss you pay yourself before your home, renters or auto insurance pays the rest, set as a dollar amount or a percentage. See more, copayCopayA fixed dollar amount, such as $20, that you pay for a covered health care service under your health insurance plan. See more or coinsuranceCoinsuranceYour share of the cost of a covered health care service, set as a percentage such as 20%, that you pay after meeting your deductible. See more |
Worked example. A provider bills $400. With an allowed amount of $250 and $200 paid by the plan, the EOB shows $50 for you. A bill that also says $50 matches. If it says $180 instead, call before paying.
Who it applies to. Anyone whose health plan processes a claim for their care.
Documents to keep together
- The EOB
- The provider's bill for the same date of service
- Your plan's member services number
- Notes of any calls about a mismatch
Official source. CMS's guide to reading an explanation of benefits and the NAIC's consumer sheet on EOBs, checked October 2026.
Good to Know
CMS advises checkingChecking accountA bank or credit union account for everyday money going in and out, used by debit card, checks, transfers and direct deposit. See more an EOB for mistakes and comparing it with the provider's bill: the services and supplies should match, and the amount the bill asks for should match what the EOB says you owe. A charge you don't recognize can mean a billing error, so call the provider's billing office and your plan. If a bill asks for more than the allowed amount, HealthCare.gov calls that balance billing, and it happens most often with out-of-networkOut-of-networkDescribes a provider that has no contract with your health plan, so the plan pays less or nothing for the care and you may be billed more. See more providers.
FAQ
Is an explanation of benefits a bill?
No. CMS's guide says an EOB is not a bill; it explains how your plan shared the cost of care. The bill, if you owe anything, comes from the provider.
Should I pay the bill before I get the EOB?
Waiting for the EOB lets you check the bill first, since CMS advises comparing the two for the right services and the right amount. If the bill's due date comes first, call the provider and ask them to hold it while the claim is processed.
Why is the allowed amount lower than what the doctor billed?
The allowed amount is what your plan and the provider agreed the care is worth. CMS's guide notes it may differ from the provider's charges.
Do It in Buhata
Bills (Plus), Reminders
Add a medical bill to Bills (Plus) once it matches its EOB, and set a Reminder a few days before it's due.
Open BuhataRelated Terms and Categories
- Out-of-network
Describes a provider that has no contract with your health plan, so the plan pays less or nothing for the care and you may be billed more.
- In-network
Describes a doctor, hospital or other provider that has a contract with your health plan, so you usually pay less for covered care than you would outside the network.
- Coinsurance
Your share of the cost of a covered health care service, set as a percentage such as 20%, that you pay after meeting your deductible.
- Copay
A fixed dollar amount, such as $20, that you pay for a covered health care service under your health insurance plan.
- Medical debt
Money owed for health care, such as hospital, doctor, lab or ambulance bills; unpaid bills can go to collections and, in some cases, onto credit reports.
- Health insurance deductible
What you pay on your own for covered health care before your health insurance plan begins sharing the cost.
Sources
Centers for Medicare & Medicaid Services, "How to read a health insurance explanation of benefits"; CMS, "Explanation of Benefits" (printable sample); National Association of Insurance Commissioners, "Health Care Bills: Explanation of Benefits"; CMS, "How to read your medical bill"; HealthCare.gov Glossary, "Balance billing"
- www.cms.gov/medical-bill-rights/help/guides/explanation-of-benefits
- www.cms.gov/files/document/printable-explanation-benefits-eob.pdf
- content.naic.org/sites/default/files/inline-files/explanation-of-benefits.pdf
- www.cms.gov/medical-bill-rights/help/guides/how-to-read-bill
- www.healthcare.gov/glossary/balance-billing
Last updated .