https://help.ea.com/article/change-your-origin-id

We heard you wanted to change your Origin ID, so we created a new tool for you to change it! Simply go to http://www.origin.com/us/change-id and login with your EA or Origin Account username and password. Now you are free to change your Origin ID to something new and exciting!

Caution: If you use the same persona for EA's forums, this action may affect elements of your forums identity; including post counts, standing, and permissions. You may also have to log out of the forums if you're signed-in during the name change.