What is the main function of the Advance Beneficiary Notice (ABN)?

The Advance Beneficiary Notice (ABN) serves a crucial function in Medicare protocols. Its primary purpose is to inform patients that a particular service may not be covered by Medicare and to outline any associated costs that may arise as a result. When a healthcare provider anticipates that Medicare may deny payment for a specific service, they must provide the ABN to ensure patients understand their financial responsibilities before receiving that service.

This notice allows patients to make informed decisions regarding their healthcare, knowing in advance that they may be liable for payment if their service is deemed non-coverable by Medicare. Therefore, option B accurately captures the essence of the ABN's role in the healthcare billing process. Moreover, it highlights how the ABN aids in transparency between providers and patients, ensuring patients are fully aware of potential out-of-pocket costs.

The other choices do not accurately reflect the essence of the ABN. While it does not provide options for choosing providers, replace prior authorization processes, or deliver results of medical tests, its focus remains primarily on cost-related communications concerning Medicare coverage.