There are 2 essential types of social security disability, SSDI, and SSI. Another name for SSI is “welfare.” SSDI is an insurance system. During your working life, you may have paid into the social security system for a certain number of years. The amount that you will draw out monthly under SSDI will depend on how much you have contributed into the system. That is different from SSI, which is welfare. You have to both be disabled and be very poor in order to get benefits under SSI. If you get SSDI, which is based on contributions, that comes with Medicare 24 months after the onset date of your disability. If you’re applying for SSI, you will immediately, if you’re accepted, get Medicaid.