What Is an EOB (Explanation of Benefits)?

An Explanation of Benefits (EOB) is a document your insurance company sends after processing a claim. It's not a bill — it's a summary of what was billed, what insurance paid, and what you may owe.

Key Sections of an EOB

Service date: When you received care
Provider: Who provided the service
Billed amount: What the provider charged
Allowed amount: The negotiated rate your insurer will consider
Insurance paid: What your insurer actually paid
Your responsibility: Copay, coinsurance, deductible amounts you owe
Claim status: Approved, denied, or pending

How to Spot EOB Errors

Common errors that lead to incorrect denials or higher costs:

Wrong billing code (CPT/ICD-10)
Duplicate charges for the same service
Services coded as out-of-network when provider is in-network
Preventive care not coded as preventive (should be $0)
Incorrect patient information

What to Do If Your EOB Shows a Denial

Read the denial reason code carefully
Compare the EOB to your actual medical records
Call your insurer to clarify the denial
If it's a coding error, ask the provider to resubmit
If it's a coverage denial, file a formal appeal

Need Help Writing Your Appeal?

Our AI-powered tool analyzes your denial letter and generates a personalized appeal in minutes. Upload your denial and get started for free.

Start Your Free Appeal

Frequently Asked Questions

Is an EOB the same as a bill?

No. An EOB is an explanation from your insurer — it shows how a claim was processed. Wait for the actual bill from your provider before paying. Sometimes the amounts differ if the provider and insurer are still negotiating.

Why did I get an EOB for a preventive visit?

You should still receive an EOB for preventive visits, but your responsibility should be $0 for covered preventive services. If you're being charged, the visit may have been coded incorrectly — contact your provider to have it re-coded as preventive.