What does "Explanation of Benefits" mean?

The short answer

An Explanation of Benefits (EOB) is a statement from your insurance company that shows what they were billed, what they covered, and what you may still owe for a recent medical visit or service.

What’s on an EOB?

Every EOB breaks down a medical claim into a few key pieces:

• Total charges — what the provider billed your insurance
• Allowed amount — the negotiated rate your insurance actually agrees to pay
• What insurance paid — the portion your plan covered
• What you owe — your share, including copays, coinsurance, or deductible amounts
• Service details — the date, provider name, and a description of what was done

Is it a bill?

No. This is one of the most common points of confusion. An EOB is not a bill. It’s a summary from your insurance company. Your actual bill will come separately from the doctor or hospital. Wait for that bill before paying anything.

When should you worry?

Review every EOB you receive. Look out for:

• Services you don’t recognize — this could mean a billing error or even fraud
• Claims marked as denied — your insurance may have rejected part or all of the claim
• Higher-than-expected costs — a provider may have been out of network or a service wasn’t covered
• Incorrect patient or provider info — mistakes happen and can affect what you owe

What to do if something looks wrong

1. Compare the EOB to your bill — make sure the amounts match
2. Call your insurance company — the phone number is on the EOB itself
3. Contact your provider’s billing office — they can correct errors and resubmit claims
4. File an appeal — if a claim was denied and you believe it should be covered, you have the right to dispute it
5. Keep your EOBs — save them for at least a year in case of billing disputes or tax purposes