How eob works
An EOB is not a bill; it is a summary of how the payer processed the claim, breaking down the billed amount, the allowed amount under the plan's contract, any deductible or coinsurance applied, and the resulting patient responsibility. For providers, the EOB is the paper equivalent of the electronic ERA used for automated posting.
Billing staff use the EOB, or its electronic counterpart the ERA, to verify a claim was paid correctly and to generate the patient statement for any remaining balance. Discrepancies between what was expected and what the EOB shows, such as an unexpected denial or a lower-than-contracted payment, are flagged for appeal or follow-up.
Example
A patient receives an EOB showing a $400 billed charge, a $280 plan-allowed amount, $224 paid by the insurer, and $56 owed by the patient after a 20 percent coinsurance. The billing team matches this to its own claim record, confirms the payment matches the contracted rate, and mails the patient a statement for the $56 balance.
EOB in QuickBooks Online vs Xero
Practice-management and EHR systems generate or import EOB and ERA data automatically from the clearinghouse, posting the payment and adjustment amounts to the patient account. That posted data then needs to be reconciled to the deposit actually received in the general ledger in QuickBooks Online or Xero.
Common mistakes
- Mailing a patient a bill before the EOB or ERA comes back from the payer, which can charge the patient the full amount instead of the balance after insurance processing.
- Not comparing the EOB's paid amount to the provider's contracted rate with that payer, which lets an underpayment go unnoticed and unchallenged.
- Confusing an EOB sent to the patient with an actual bill, which can cause a patient to pay twice or ignore a real statement that arrives afterward.
Why it matters
The EOB is what tells a provider and a patient exactly how a claim was adjudicated, so reading it correctly protects revenue a practice is contractually owed and prevents a patient from being billed the wrong amount. For a healthcare provider watching cash flow, catching an EOB that shows a lower-than-contracted payment early is often the only chance to appeal before the payer's deadline closes that revenue off for good.
Related terms
How LedgerBPO handles eob
We review EOBs and ERAs line by line to confirm claims were paid at the contracted rate, generate accurate patient statements for remaining balances, and reconcile the resulting deposits to your books. Follow-up on unexpected denials is handled through our insurance follow-up call service.