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📄 '''Explanation of benefits (EOB)''' is a statement issued by a [[Definition:Health insurance | health insurance]] plan to a covered member after a [[Definition:Claim | claim]] has been processed, detailing what medical services were billed, how much the plan paid, what portion the member owes, and why any charges were adjusted or denied. Despite its name, the EOB is not itself a bill — it is an informational document that translates the often complex adjudication logic of a health plan into a format the member can review before receiving a provider's invoice.

🔍 When a [[Definition:Healthcare provider | provider]] submits a claim, the insurer's [[Definition:Claims adjudication | adjudication]] engine applies the plan's [[Definition:Fee schedule | fee schedule]], [[Definition:Network | network]] discount agreements, [[Definition:Deductible | deductible]] and [[Definition:Copayment | copayment]] rules, and any applicable [[Definition:Coordination of benefits (COB) | coordination of benefits]] provisions. The EOB reflects the output of that process: it lists each service by [[Definition:Current Procedural Terminology (CPT) | CPT]] or procedure code, shows the billed amount versus the [[Definition:Allowed amount | allowed amount]], specifies how much was applied to the deductible or [[Definition:Coinsurance | coinsurance]], and notes any items denied along with the denial reason code. Modern [[Definition:Insurtech | insurtech]] platforms increasingly deliver EOBs digitally through member portals and mobile apps, replacing paper statements and enabling real-time transparency into claim status.

💡 Clear, timely EOBs serve as a frontline defense against billing errors, [[Definition:Insurance fraud | fraud]], and member confusion — all of which drive unnecessary costs and erode trust. When members can easily verify that the services listed match what they actually received and understand why certain charges were reduced or denied, they are better equipped to catch discrepancies and pursue [[Definition:Appeal | appeals]] when warranted. For insurers, well-designed EOBs also reduce inbound call center volume, because many routine questions are answered by the document itself. Regulatory requirements around EOB content and delivery timelines vary by state and by the federal rules governing [[Definition:Employee Retirement Income Security Act (ERISA) | ERISA]]-regulated plans, making compliance a persistent operational consideration.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Claims adjudication]]
* [[Definition:Coordination of benefits (COB)]]
* [[Definition:Deductible]]
* [[Definition:Allowed amount]]
* [[Definition:Health insurance]]
* [[Definition:Appeal]]
{{Div col end}}

Definition:Explanation of benefits (EOB) - Revision history

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