How to Make Simple Billing Software for Small Business. What function does billing software serve in the workplace. There are several options to choose from when it comes to the best medical billing software. For administrative duties like patient registration, appointment scheduling, charge entry, and collections administration, Medisoft provides tools. Its features include patient billing, claims administration, and appointment scheduling. As technology continues to advance, medical billing software is now more accessible and affordable than ever before. The Best Options to Consider for Medical Billing Software for Small Businesses.