Decode EOBs, deductibles, copays, and out-of-pocket maximums — know what you owe, what you don't, and why the bill never matches what you expected.
Your financial responsibility is not just one number. It depends on the interaction of several cost-sharing components — and the order in which they apply.
| Term | What It Means | Key Point |
|---|---|---|
| Deductible | Amount you pay before insurance begins paying for most services | Some services (like preventive care) may be covered before deductible is met |
| Copay | Fixed amount you pay for a specific service, regardless of total cost | Copays may apply even before your deductible is met |
| Coinsurance | Your percentage share of costs after deductible is met | Example: 20% coinsurance means you pay 20%, insurance pays 80% |
| Out-of-Pocket Max | The most you will pay in a plan year for covered in-network services | After this is reached, insurance typically pays 100% of covered costs |
| In-Network | Out-of-Network | |
|---|---|---|
| Rates | Negotiated lower rates apply | Higher charges, may have no ceiling |
| Counts toward deductible | Yes | Depends on plan — may not count |
| Counts toward OOP max | Yes | Often does not count |
| Balance billing | Not permitted | May apply — additional charges possible |
An EOB is not a bill. It is a statement from your insurer explaining how a claim was processed. It shows what was charged, what the insurer paid, and what you may owe.
Key fields to check on every EOB:
