Explanation of Benefits (EOB) Definition | OnlineHealthIns.com Glossary

Explanation of Benefits (EOB)

Also known as: EOB, Explanation of Benefits Statement

A statement your health plan sends after a claim is processed, showing what was billed, what the plan paid, and what you may owe.

An Explanation of Benefits, or EOB, is a document your insurance company sends after processing a claim for care you received. It's not a bill, but a summary of how the claim was handled: what the provider charged, what the plan's negotiated rate was, how much the plan paid, and what portion, if any, you're responsible for.

Shows the provider's billed charge alongside the plan's negotiated or allowed amount.
Breaks down what was applied to your deductible, copay, or coinsurance.
Indicates the amount, if any, the provider may still bill you directly.

Reviewing an EOB is one of the best ways to catch billing errors, like being charged for a service you didn't receive, or a claim processed as out-of-network when it should have been in-network. Comparing the EOB to the actual bill from your provider can also reveal discrepancies worth disputing.

A common point of confusion is treating the EOB itself as an invoice and paying it directly. The EOB is informational; any actual payment request should come as a separate bill from the provider, and the two should match.

Example

After a specialist visit, a member receives an EOB showing the provider billed $400, the plan's negotiated rate was $250, the plan paid $200, and the member owes a $50 coinsurance balance.

Good to Know

An EOB is not a bill, so don't pay it directly; compare it against the actual invoice from your provider to confirm the amounts match before paying anything.

Related Terms

Coinsurance — The percentage of a covered service's cost you pay after meeting your deductible, with your insurance plan paying the rest.

Deductible — The amount you must pay out of pocket for covered care each year before your health plan starts sharing costs through copays or coinsurance.

Copay (Copayment) — A fixed dollar amount you pay for a specific covered service, like a doctor visit or prescription, regardless of the service's actual cost.

Network (In-Network / Out-of-Network) — The group of doctors, hospitals, and other providers that have agreed to accept a health plan's negotiated rates; using providers outside that group usually costs more.