After you shore up your medical documentation, there’s one last piece of the equation that you can’t forget — the provider’s signature. Medicare requires that services provided or ordered be authenticated by the author, and the method used for authenticating would be a handwritten or electronic signature. Stamped signatures are not acceptable with the exception of the author having a physical disability that prevents them from signing the record. Check out the following chart to determine whether you’ve met the signature requirements dictated by CMS: