If you have previously registered as a graduate student at UCSD at any time, whether or not you completed any course work, DO NOT FILE A NEW APPLICATION. Obtain a petition for readmission from your former department, group, or school graduate office.
All application processes are online at the application Admissions website. To create an online application account you will need a valid email address. This email address will be your login name. It will also be the primary line of communication between you and UCSD. Be sure to use an address that will not change: do not use a temporary address. The activation email and additional instructions to complete your registration will be sent to this address.