Benefits of Outsourcing Medical Billing. The top medical billing businesses to work for are AdvancedMD, Kareo, and Greenway Health. Improving cash flow is among the most important benefits of outsourcing medical billing. Outsourcing medical billing has become increasingly popular among medical professionals due to the many benefits that it provides. Additionally, it guarantees adherence to rules, minimizes errors, and grants access to the newest tools and technologies. Medical billing outsourcing also offers scalability and flexibility. Online directories, personal recommendations, and trade groups are good places to look for medical billing companies. We will talk about the top medical billing businesses to work for, those that are nearby, and how to outsource your medical billing tasks in this blog post.