Claim still in process
Bill mailed before insurer finished paying. Wait for the next statement.
Bill vs EOB
When the bill and the EOB don't agree.
An Explanation of Benefits shows how your insurer processed a claim. A patient statement shows what the provider is asking you to pay. When they disagree, compare the documents before sending money.
The six fields that matter
What to compare.
Six fields decide whether your bill is right or wrong. Compare them line-by-line.
- Allowed amount - the rate your insurer recognizes for the service.
- Plan paid - what your insurer actually paid.
- Patient responsibility (PR) - what the EOB says may be your share.
- Provider statement balance - what the provider is asking for.
- Date of service - should match across documents.
- CPT code - should match across documents when a code is shown.
If the provider statement balance is higher than the EOB's patient responsibility, ask the provider to reconcile the balance in writing. Common causes include timing issues, claim resubmissions, or possible balance billing.
Common scenarios
Why they don't match.
Provider is balance-billing
Charging the difference between what they billed and what the insurer allowed. Ask whether network rules or surprise-billing protections apply.
Out-of-network surprise
Even at an in-network facility, an out-of-network provider may bill separately. Check whether No Surprises Act protections apply.
Coding issue
Provider used a code your insurer did not cover. Ask whether the provider should review the coding before you appeal.
Different date of service
The bill bundles services from multiple visits. Always check the date.
Charge for non-covered service
Insurer denied a specific line. The provider then bills you for it. Sometimes legitimate, sometimes appealable.
FAQ
Common questions.
Should I trust the EOB or the bill?
Use the EOB as the comparison point, then verify the provider bill against the same claim, provider, date of service, allowed amount, plan payment, and patient responsibility.
Can I refuse to pay if they don't match?
Ask the provider to explain the discrepancy in writing before you pay. Keep a copy of your message and ask whether the account can be held while they review it.
What if I don't have an EOB?
Log into your insurer's member portal or call the insurer and ask whether the claim was processed. If the provider says it never submitted to insurance, ask why and document the answer.
How long should I wait before disputing?
Confirm whether the insurer has finished processing the claim. Some mismatches happen because a provider statement arrived before the final EOB.
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