An Explanation of Benefits (EOB) is a statement from your health insurance company that breaks down what medical care you received, what your plan paid, and what you owe—but it is not a bill and does not request payment. Your provider will send a separate bill for the amount you actually owe. Understanding your EOB helps you catch billing errors, verify your costs are correct, and know what to expect when the provider's bill arrives.
You typically receive an EOB by mail, email, or member portal within 30 to 60 days after treatment. If you don't get one within 60 days, contact your health plan to request it. The EOB is purely informational—your actual payment obligation comes in the provider's bill, which should match the patient responsibility amount listed on your EOB.
Table of Contents
- The Five Key Numbers on Your EOB
- Deductibles, Copays, and Coinsurance Explained
- Network vs. Out-of-Network Pricing
- Spotting Errors and Filing an Appeal
- Frequently Asked Questions
The Five Key Numbers on Your EOB
Every EOB shows five pieces of information that work together to explain your costs. The service description tells you what care you received and when; the billed amount is the provider's initial charge; the allowed amount is the discounted price your insurance plan negotiated with in-network providers; the insurance payment is what your plan actually pays; and the amount you owe is your portion after deductible, copay, and coinsurance. These numbers aren't random.
If a provider charges $500 for a procedure but your plan's allowed amount is $300, the insurance company only considers $300 when calculating their share. You owe your portion of the allowed amount, not the original billed charge—which is why the patient responsibility on your EOB should eventually match your provider's bill to you..
Deductibles, Copays, and Coinsurance Explained
Three terms control how much you pay out-of-pocket. A deductible is the amount you must pay for most covered services before your health plan begins to share costs; a copay is a flat fee you pay per visit or prescription; coinsurance is a percentage of costs you pay after meeting your deductible. Your EOB shows how much of your deductible you've used so far this year and applies your copay or coinsurance to the current service.
For example, if your deductible is $1,500 and you've paid $1,200 already, a $400 service might show $300 toward your remaining deductible and the plan paying $100. Once your deductible is met, you'll see coinsurance percentages kick in—like paying 20% while your plan pays 80%.
Network vs. Out-of-Network Pricing
Where you receive care affects what you pay. The allowed amount is the discounted price that doctors in your insurance plan's network have agreed to charge for a service; if you see an out-of-network provider, you may pay more than this amount. Your EOB will note whether a provider was in-network or out-of-network; out-of-network claims often show a higher billed amount and a different allowed amount, putting more of the cost on you.
If you received unexpected out-of-network care (like an out-of-network anesthesiologist during an in-network surgery), your EOB is where you'll spot it. Some plans cover out-of-network emergency care at in-network rates, so check your plan details if you see an unexpectedly high patient responsibility for urgent care.
Spotting Errors and Filing an Appeal
Your EOB is a document to review carefully, not just file away. To verify accuracy, check that your personal information is correct, compare dates of service and procedure codes to what you actually received, and look for duplicate charges or services you don't recognize. If you find an error, request an itemized bill from your provider (listing every service, code, and date) and call your insurance company to report the discrepancy; if you believe a claim was processed incorrectly, you have the right to file an appeal with the insurance company, with the EOB typically including instructions for how to do so.
Keep copies of both documents while the appeal is being reviewed. Insurance companies must respond to appeals within a set timeframe (usually 30 days for standard appeals), so note the deadline your EOB provides.
Frequently Asked Questions
Is my EOB the same as my bill?
No. Your EOB is an explanation from your insurance company showing how they processed your claim. Your provider sends a separate bill requesting the amount you owe based on your patient responsibility from the EOB.
Why does my EOB show a different amount than what I'm being billed?
The allowed amount (what insurance deems reasonable) may be less than what the provider charged. You owe your portion of the allowed amount, not the original billed charge. If amounts don't match, request an itemized bill from your provider and contact your insurer.
What should I do if I don't receive my EOB?
Wait up to 60 days after treatment. If it doesn't arrive, contact your health plan directly to request it. You can often access it through your member portal even if it hasn't arrived by mail.
Can I appeal if I disagree with what my insurance paid?
Yes. Your EOB includes instructions for filing an appeal if you believe the claim was processed incorrectly. You have a right to request a review within the timeframe listed on your EOB.