Get Medicare forms for different situations, like filing a claim or appealing a coverage decision. Find Forms. Publications.Get the forms you need to sign up for Part B including CMS-40B, CMS-L564, CMS-10797, and CMS-10798. Read the following before completing the application. How do I file a claim? You can download and fill out a form, called the Patient Request for Medical Payment form (CMS-1490S). How it works; How to prepare to sign up and submit a Medicare application. Find out what Medicare costs based on what coverage you choose. Information you'll need to provide ; Basic information about yourself. How to fill out this form. 1.