Reading Your EOB

An Explanation of Benefits (EOB) is a statement your insurance company sends after you receive medical care. It is not a bill — it's a summary of how your claim was processed, what your plan covered, what you owe, and what your provider may still bill you for.

An EOB typically shows the amount your provider charged, the amount your insurer's negotiated rate allows, and the difference between them. You're not responsible for the difference between the billed amount and the negotiated rate if the provider is in-network — that write-off is part of your plan's network agreement.

It also shows what you owe, based on your deductible, copay, and coinsurance. If your deductible hasn't been met yet, you may owe the full allowed amount; once it's met, you owe only your share. The EOB tracks how much of your deductible and out-of-pocket maximum you've used for the year, which is useful for planning remaining care.

To read an EOB correctly: check that the date, provider, and service match what you actually had done; look at the 'allowed amount' to understand what your plan negotiated; and verify your 'you owe' amount makes sense given your cost-sharing. Save your EOBs — they're your record for matching charges against any actual bills you receive.

Billing errors are not uncommon, so it's worth scanning for the classic red flags. Watch for duplicate claims where the same service is billed twice, services you never received, and charges that change after an EOB was issued. If something looks off, contact your insurer first, and your provider if needed.

The most important distinction is that an EOB is not a bill — it's your map for checking the real bill. Comparing your EOBs to any provider invoices before you pay is the single best way to catch overcharges and keep your out-of-pocket costs accurate.