Most people file the EOB under bills.
- “The EOB says I owe this, so I should pay it now.” The EOB explains a claim. The provider bills separately.
- “The billed amount is on me.” The network adjustment is a contractual reduction, not part of the employee's share.
- “The plan paid, so I am done.” The employee's share can still include deductible and coinsurance.
- “The bill should match the EOB to the dollar.” One bill can combine claims, and payments take time to post.
- “HR can get it fixed.” The plan explains its decision. The provider's billing office explains the bill.
Address those five in your enrollment materials, before the first claims arrive.
The one-minute explanation.
It is the plan's receipt, not a bill.
An EOB shows what the provider charged and how the plan handled the claim. Employees pay the provider's bill, never the EOB.
The charge shrinks in two steps.
The network adjustment brings the charge down to the allowed amount. The plan then pays its portion of that allowed amount.
What is left belongs to the employee.
That share can include deductible and coinsurance. Payments already made at the visit may reduce what is still due once they post.
One claim, two pieces of paper.
What the EOB shows
Hypothetical in-network imaging visit, deductible already met, 20% coinsurance. Billed: $900. Network adjustment: $500. Allowed amount: $400. Plan paid: $320. Employee share: $80.
What the bill asks for
The imaging center's statement asks for $130. That $50 gap is the question. It may be a second claim on the same statement, an item still pending, or a corrected claim in process. Illustrative only, not a real claim or client.
Send each question to the right place.
For the provider's billing office: Does this statement include more than one claim? Have all payments posted? Is anything waiting on a corrected claim or another insurer? Can the due date wait while the difference is reviewed?
For the health plan: What do the explanation codes mean? Is any part pending, adjusted or denied? If it was denied, what are the appeal steps and the deadline? The denied-claim guide covers what comes next.
Either way, the employee keeps a paper trail: the EOB, an itemized bill, payment receipts, and call notes with names and dates.
A note to send before the first claims arrive.
Sample note to employees: “After you get care, [carrier] sends an Explanation of Benefits, or EOB, [by mail or in the carrier app]. An EOB is not a bill. It shows what the provider charged, the network discount, what the plan paid and the part that is yours. When a bill arrives, check it against the EOB before you pay. If they do not match, call the provider's billing office first and note who you spoke with. Still stuck? Contact [name] and we will help you find the next step.”
What to keep handy, and when to call us.
Keep handy
The SBC for each plan, to point at the deductible and coinsurance. Login steps for the carrier app, where EOBs live. The member services number from the ID card. Our cost-sharing guide and glossary for the terms.
Call us when
The plan and the provider each say the other has to fix it. A denial needs an appeal and the deadline is close. A visit was processed as out of network and the employee expected otherwise. Several employees report the same problem with one provider. A due date is near and the difference is unresolved.
What HR teams ask about EOBs.
Should HR call the carrier on the employee's behalf?
Usually the employee makes the call, since it is their claim and their health information. Help them prepare the questions above. When the plan and provider are stuck, bring us in.
Why does the EOB show a large amount nobody paid?
That is typically the network adjustment, the contractual reduction for in-network care. It is not added to the employee's share.
The employee paid at the visit. Why does the bill still show the full share?
Payments and adjustments take time to post. Have them compare the receipt with the latest EOB, then ask the billing office to show how it calculated the balance.
Where do employees find their EOBs?
From the carrier, by mail or online depending on the carrier. Show them where during enrollment meetings, while they are already logged in.
Official references.
CMS: how to read an Explanation of Benefits. General information, not legal or tax advice.
Add claims and bills to your next benefits session.
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