Understanding Your Explanation of Benefits (EOB): What Every Patient Should Know

An Explanation of Benefits (EOB) is a statement from your health insurance company that explains what medical services were billed, how much the insurance plan covered, and what you may owe. It is not a bill — it is an informational document that helps you understand how your benefits were applied to a specific claim. Every time a healthcare provider submits a claim to your insurance, you should receive an EOB. If you are not receiving EOBs, contact your insurance company to make sure they are being sent to your current address or are available through your online portal.

A typical EOB includes these sections: - Provider information: The name of the doctor, hospital, or facility that provided the service. - Date of service: When the medical service was performed. - Service description: A description of each procedure, test, or service, often with CPT codes. - Amount billed: The total amount the provider charged for the service. - Allowed amount: The maximum amount your insurance plan will pay for the service based on your plan's negotiated rate. - Insurance paid: The amount your insurance company actually paid to the provider. - Your responsibility: The amount you owe, broken down into deductible, copay, and coinsurance. - Claim status: Whether the claim was approved, denied, or is still being processed.

This is where most billing errors are caught. Compare every line item on your medical bill to the corresponding entry on your EOB: 1. Verify that the dates of service match 2. Confirm that the procedure codes (CPT codes) are the same 3. Check that the amounts billed match 4. Ensure the insurance payment shown on your bill matches what the EOB says the insurer paid 5. Verify that your responsibility amount on the bill matches the EOB Any discrepancy between these documents is a red flag. Common issues include providers billing you for the full charge instead of the insurance-adjusted amount, or billing you for amounts your insurance already paid.

If you find a mismatch between your EOB and your medical bill, contact the provider's billing department first. Reference the specific claim number from the EOB and point out the discrepancy. In many cases, this is a simple billing error that can be corrected. If the provider cannot resolve the issue, contact your insurance company's member services line. They can verify what was paid and may contact the provider directly to resolve the dispute. Always keep copies of both your EOBs and medical bills for at least 12 months after the date of service.