Explanation of Benefits (EOB) Explained
An Explanation of Benefits is a health claim processing summary. It is usually not a bill; it explains how the insurer processed a submitted claim.
Important: This page is general educational information. Policy wording, laws, claim handling rules, provider contracts, and timelines vary by insurer, product, and location. This site does not interpret your policy, review documents, represent you, or provide legal, medical, financial, or claim strategy advice.
Common EOB sections
| EOB section | What it means |
|---|---|
| Billed amount | What the provider charged. |
| Allowed amount | The amount the plan uses for processing under plan/network rules. |
| Plan paid | What the insurer or plan paid. |
| Patient responsibility | Deductible, copay, coinsurance, non-covered, or other amount assigned to the patient. |
| Reason codes | Short explanations for reductions, denials, or adjustments. |
Why an EOB is usually not a bill
A provider bill is a request for payment. An EOB is a processing statement from the insurer. If the two do not align, the difference may relate to timing, network rules, adjustments, or corrected claims.
Neutral EOB review checklist
- Confirm the service date and provider.
- Compare billed amount, allowed amount, plan paid, and patient responsibility.
- Read reason codes and notes.
- Look for duplicate or corrected claims.
- Use official insurer/provider channels for questions.
Plain-English boundary: Use this article to understand common claim mechanics and vocabulary. For a specific claim, your policy, insurer communications, medical/provider records, repair estimates, and local rules control.