Bill vs EOB
My Medical Bill Does Not Match My EOB
When the provider bill and your EOB show different numbers, the discrepancy is often a billing error you can dispute with documentation.
Updated August 16, 2026 · 7 min read
Quick answer
If your medical bill does not match your EOB, gather both documents, compare them line by line, and identify every discrepancy. Then contact your provider billing department with your EOB claim number and request a corrected bill.
Gather Your Documents
Before contacting anyone, collect your EOB, the provider bill, and your insurance card. Note the claim number on the EOB and the account number on the bill. Having both documents side by side makes it easier to pinpoint exactly where the numbers diverge.
Compare Line by Line
Pull up the service-by-service breakdown on your EOB and compare each line to the corresponding line on the bill.
- Services on the bill that do not appear on the EOB.
- Different dollar amounts for the same service.
- A patient responsibility total that exceeds the EOB total.
- Charges for services you did not receive.
Contact the Provider
Call the provider billing department. Reference the EOB claim number and explain each discrepancy you found. Ask them to review and correct the bill. Request a revised statement in writing.
Escalate to Your Insurer
If the provider does not resolve the mismatch, contact your insurer. File a formal dispute and provide copies of both documents. Your insurer is required to investigate and respond, typically within 30 days.
Do Not Pay Until Resolved
You are not obligated to pay a bill you believe contains an error. Document the discrepancy, initiate the dispute process, and wait for resolution before making a payment.
What the research says
Billing errors are among the most common reasons for medical bill disputes.
Frequently asked questions
How long do I have to dispute?
There is no universal deadline, but act quickly. Most providers allow 60 to 120 days. Dispute within 90 days to be safe.
What if my provider threatens collections?
Send a written dispute letter by certified mail requesting that the account be held while the discrepancy is investigated.
Can Clearwell help me find the discrepancy?
Yes. Clearwell reads your EOB and bill, flags every mismatched line, and generates a dispute letter you can send.
Not sure where your bill stands?
Upload your medical bill and insurance EOB. Clearwell compares them, finds likely billing errors, and gives you a plain-language action plan — in minutes.
Analyze your medical billRelated resource
The Complete Guide to Fighting Medical Bills
Everything you need to understand, verify, dispute, and negotiate your medical bills — in one place.
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