How to read an Explanation of Benefits (EOB)—and compare it with your medical bill
An EOB is the insurance explanation, not a bill. Learn which numbers matter and what to do when the office bill does not match.
Updated August 6, 2026. Educational guidance, not medical or legal advice.
The short answer
An Explanation of Benefits (EOB) is a statement from your health plan showing how it handled a claim. It usually lists what the office charged, the price recognized by the plan, what insurance paid, and what the plan says may be your share. It is not a bill. Compare it with the separate bill from the medical office before paying.
Step by step
Do these things in order
First make the papers agree. Then ask for the right fix, insurance review, money back, financial help, or lower price.
- 01
Match the patient, office, and date
Start with the patient name, medical office or facility, date of care, claim number, and service description. If these do not match the care you received, ask the insurance plan which claim the EOB describes.
- 02
Read the four main amounts
Find the office charge, the amount recognized by insurance, the insurance payment, and the amount shown for you. Also read every remark or reason code because it may explain a denial, missing information, network decision, or amount applied to your deductible.
- Amount charged by the office
- Amount recognized by insurance
- Insurance payment and discounts
- Amount the plan says may be yours
- 03
Compare the EOB with the actual bill
Match the services and amounts line by line. CMS says the office bill should not be higher than the patient balance shown on the EOB, although the EOB may not include money you already paid. Ask the office to explain any difference before paying it.
- 04
Send the question to the right place
Ask the medical office about missing payments, discounts, duplicate-looking charges, or an incorrect office balance. Ask insurance about denied lines, network handling, plan rules, or a claim that needs another review.
What to gather
Use what you have. If something is missing, we can help you ask for it.
- Complete insurance explanation (EOB)
- Bill from the medical office or facility
- Detailed list of charges, if available
- Receipts or proof of payments already made
What BKVHealth handles
We read the papers, organize the numbers, show what is known and what needs checking, and write the next call script, message, or letter.
BKVHealth prepares scripts and drafts. You review and send provider or insurer communications unless a separate written service arrangement says otherwise.
Results depend on the records, coverage, provider, insurer, and actions taken. BKVHealth does not guarantee a reduction or payment.
Common points of confusion
Check these things before you act
A clear, specific question usually gets a more useful answer than saying only that the price feels wrong.
Paying the EOB
The EOB explains insurance handling. Pay only a real bill from the medical office after checking that the records agree.
Ignoring reason codes
A short letter-and-number code may explain why insurance denied or changed a line. Read its definition before choosing the next action.
Forgetting earlier payments
The EOB may show a patient amount without knowing what you paid at the visit. Make sure the office account credits every payment.
Keep going
Choose the next guide that matches your paperwork
Each guide handles a different moment. Start with the paper or problem in front of you.
Common questions
Short answers before you start
Use the exact paperwork in your case when a plan, hospital, or office rule can change the answer.
Is an EOB a medical bill?
No. It is the health plan’s explanation of how it handled the claim. The medical office sends a separate bill if it says you owe money.
What if the office bill is higher than the EOB?
Ask the office for a detailed explanation and compare payments and discounts. CMS advises talking to the office when its bill exceeds the EOB patient balance.
Why does the EOB still show money I already paid?
Insurance may not know what you paid at the visit. Check that the medical office credited the payment on its own account statement.
Official information we checked
See the rule from the organization responsible for it
Insurance rules, deadlines, and legal protections can change. These links go to official agencies and organizations.
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We read the paperwork and write what to say next. Keep every reply in the same case.