I have to add to Linda's post because I certainly agree with her. There is no Mandatory National Certification for medical billing at all. I am certified through an association and that is explained by Linda's article that she referenced. I chose to go for certification but I also researched what I would learn in those classes, I've been doing this for 17 years and I still have to keep learning. Getting a good education and staying on top of things is what matters and what will help you succeed.