EOB vs. medical bill: how to compare them
An Explanation of Benefits (EOB) is your insurer's record of a claim: what the provider billed, what the plan paid, and what you owe. Your insurer's Explanation of Benefits says "this is not a bill." Here's why it's still the most useful document you have.
Updated October 4, 2026 · 1 min read
The short version
- The EOB isn't a bill, but it says what you should owe: the "patient responsibility."
- Match it to the bill with the same provider and date of service, then compare the amounts.
- If the bill asks for more, call billing and ask them to match the EOB.
An EOB isn't a bill, but it tells you what you should owe. If the hospital's bill asks for more than the EOB says, something needs fixing.
What do the numbers on an EOB mean?
- Amount billed: what the provider charged the insurer.
- Allowed amount: the total price your plan and the provider agreed on for that service (what the plan pays plus your share). For in-network care, the provider generally can't bill you for the difference between the billed and allowed amounts.
- Plan paid: what the insurer paid.
- Patient responsibility: your share (deductible, copay and coinsurance). This is the number to compare with your bill.
- Remark or denial codes: short codes that explain why something wasn't paid.
How do you compare an EOB with your bill?
THE BILL
AMOUNT DUE$1,340.00
YOUR INSURER'S EOB
PATIENT RESPONSIBILITY$340.00
- Match each EOB to the bill with the same provider and date of service.
- Compare the bill's balance due with the EOB's patient responsibility.
- If the bill is higher, ask the billing office why. Common causes: the claim hasn't been reprocessed, a payment hasn't posted, or you're being billed for an amount above the allowed amount.
- If something was denied, read the remark code and call the insurer before you call the hospital.
“My EOB from [insurer] for [date of service] shows my responsibility as [amount], but your statement shows [amount]. Can you tell me what the difference is for, and update the balance to match the EOB?”
Educational information only, not legal, medical or financial advice. Rules vary by state and plan.