What is the difference between ABN and EOB Forms?

ABN (Advance Beneficiary Notice of Noncoverage) and EOB (Explanation of Benefits) forms serve different purposes in healthcare billing. An ABN is a notification provided to patients before they receive services that may not be covered by Medicare, informing them of their financial responsibility. In contrast, an EOB is sent after services are rendered, detailing what services were provided, what was covered by insurance, and any amounts owed by the patient. Essentially, the ABN is a preemptive notice, while the EOB is a summary of claims after treatment.