Bill vs EOB
How to Read an EOB
Reading an EOB is easier once you know what each line represents. This guide walks through every section.
Updated August 16, 2026 · 7 min read
Quick answer
An EOB lists every service you received, the billed amount, what your plan allowed, what insurance paid, and what you owe. Start at the top with your personal information and claim number, then work through each service line from left to right.
Start at the Top
The header of your EOB shows your name, your plan member ID, the claim number, and the date the claim was processed. Keep the claim number - you will need it if you contact your insurer or provider about a discrepancy.
Work Through Each Service Line
Each row on the EOB represents one billed service. Read it left to right through each field.
- 1Service Description - plain-language name of the procedure.
- 2Procedure Code - the CPT or HCPCS code that identifies the service.
- 3Billed Amount - what the provider charged for that service.
- 4Allowed Amount - the maximum your plan recognizes for that service.
- 5Insurance Paid - what your plan paid toward the allowed amount.
- 6Deductible Applied - how much of the allowed amount went toward your deductible.
- 7Copay or Coinsurance - your share of the allowed amount.
- 8Patient Responsibility - the total you owe for that line.
Check the Totals
At the bottom of the EOB, you will see summary totals: total billed, total insurance paid, total adjustments, and total patient responsibility. The patient responsibility total should equal the sum of your individual line responsibilities.
Compare to Your Bill
Once you understand your EOB, pull out the provider bill and compare line by line. Every service, code, and dollar amount on the bill should match the corresponding line on your EOB. If the bill shows a higher patient responsibility than the EOB, or lists services not on the EOB, you have grounds for a dispute.
What the research says
The patient responsibility on your EOB should match the patient responsibility on your bill.
Frequently asked questions
What if a service on my bill does not appear on my EOB?
Contact your insurer with the claim number. The service may have been processed under a different claim, denied, or billed in error.
What does 'not covered' mean on an EOB?
It means your plan did not pay for that service because it falls outside coverage, requires prior authorization, or was deemed not medically necessary.
Should I keep my EOBs?
Yes. Keep EOBs for at least one year after the date of service, or longer if you are still disputing a bill.
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Bill vs EOB
What Is an EOB (Explanation of Benefits)?
An Explanation of Benefits is a statement from your insurer that breaks down how a claim was processed.
Bill vs EOB
What Does Patient Responsibility Mean on an EOB?
Patient responsibility is the dollar amount your EOB says you owe - including copays, coinsurance, deductible, and any uncovered charges.
Bill vs EOB
My Medical Bill Does Not Match My EOB
When the provider bill and your EOB show different numbers, the discrepancy is often a billing error you can dispute with documentation.