How to Read Your Explanation of Benefits (EOB): Complete Guide
Your EOB isn't a bill, but it's critical for understanding what you owe and catching errors. Learn how to read every section and spot problems before you pay.
An EOB is a statement from your insurer AFTER a claim is processed. It is NOT a bill — but it's critical for understanding what you owe.
Key sections: 1. Patient & Provider Info: Who received care and from whom 2. Date of Service: When care was provided 3. Service / CPT Code: What was done (each service has a code) 4. Amount Billed: What the provider charged 5. Plan Discount: Negotiated reduction (in-network discount) 6. Amount Allowed: Maximum your plan pays for this service 7. What Plan Paid: How much your insurer paid the provider 8. What You Owe: Your responsibility — deductible, copay, coinsurance
How to use your EOB: 1. Compare it to the bill from your provider — amounts should match 2. Check that services listed are ones you actually received 3. Verify the provider is listed as in-network 4. If "denied" — read the reason code and consider appealing
Common denial reason codes:
- "Not medically necessary" — appeal with a letter from your doctor
- "Prior authorization not obtained" — provider may request retroactive auth
- "Out-of-network" — check if the No Surprises Act applies
- "Duplicate claim" — provider may need to resubmit with corrections
Red flags to watch for:
- Services you didn't receive
- Wrong dates of service
- Provider listed as out-of-network when they should be in-network
- Charges that seem unusually high
- Missing discounts for in-network care
What to do if there's an error: 1. Call the customer service number on your EOB 2. Reference the specific claim number 3. Explain the error you found 4. Ask them to reprocess the claim 5. Get a reference number for your call 6. Follow up in writing if needed
Important: Your EOB shows what happened AFTER your insurer processed the claim. If there's an error, both your insurer and provider may need to make corrections.
Keep every EOB. If a bill doesn't match, do NOT pay until resolved.
Official Source
https://www.healthcare.gov/glossary/explanation-of-benefits/#:~:text=Explanation%20of%20BenefitsThis information comes from official government sources and regulations.
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