Out-of-network billing, often called “surprise medical bills,” occurs when patients receive unexpected charges for the difference between out-of-network providers’ fees and their insurance coverage. This typically arises after prescription deductibles and copays are considered. For individual clinical practitioners, mastering out-of-network (OON) billing presents a significant financial opportunity. It allows providers to negotiate fair compensation while navigating the complexities of an ever-changing insurance landscape. With expertise in OON billing, practitioners can unlock new revenue sources, ensure compliance, and provide patients with clarity about their economic duties, all while strengthening their practice’s financial stability.