Bill vs EOB
Balance Billing vs. EOB Discrepancy
Balance billing is when an out-of-network provider bills you the gap. An EOB discrepancy is a mismatch between the bill and your EOB.
Updated August 16, 2026 · 6 min read
Quick answer
Balance billing occurs when an out-of-network provider bills you the difference between their charge and what insurance paid. An EOB discrepancy is when the bill and your EOB show different amounts for the same service. They require different approaches.
What Is Balance Billing
Balance billing happens when an out-of-network provider charges you the difference between their full charge and what your insurance plan paid. The allowed amount on your EOB represents what your plan considers a fair price.
What Is an EOB Discrepancy
An EOB discrepancy is when the provider bill shows a different patient responsibility than your EOB. This is usually a billing error - the provider applied the wrong codes or did not apply the contractual adjustment.
How to Tell Them Apart
Ask yourself whether you were in-network. If yes, the provider cannot balance bill you and any difference is a discrepancy. If out-of-network, check whether the No Surprises Act applies.
No Surprises Act Protections
The No Surprises Act protects you from balance billing for emergency services, non-emergency services at in-network facilities from out-of-network providers, and air ambulance services from out-of-network providers.
What the research says
The No Surprises Act took effect January 1, 2022, protecting patients from surprise out-of-network bills.
Frequently asked questions
Can an in-network provider balance bill me?
No. In-network providers agreed to accept the allowed amount as payment in full.
What if I did not know the provider was out-of-network?
The No Surprises Act requires out-of-network providers at in-network facilities to inform you and obtain consent for non-emergency services.
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